1.15f
Items:
// Mjolnir
-- Doubled the number of targets that can be hit by the chain lightning effect

Heroes:
// Abaddon
-- Curse of Avernus attack speed increased to 15/30/45/60
-- Curse of Avernus debuff duration increased to 4 seconds
-- Curse of Avernus buff duration increased to 6 seconds
// Beastmaster
-- Wild Axes cooldown reduced to 11 seconds
-- Wild Axes damage increased to 70/120/170/220 each direction
-- Scepter reduces cooldown of Primal Roar to 10 seconds
// Broodmother
-- Drastically reduced spiderling hit points
-- Reduced spiderling damage gain
-- Insatiable Hunger no longer works on buildings
-- Insatiable Hunger damage increased back to vanilla values
// Drow Ranger
-- Frost Arrow now costs 3/6/9/12 mana
-- Frost Arrow splash damage increased to 15/25/35/45
// Earth Spirit
-- Magnetize damage doubled to 100/150/200 per second
// Necrolyte
-- Heartstopper max damage now capped at 50/70/90/110
// Vengeful Spirit
-- Ultimate attack speed increased to 20/40/60

1.15e
-- Removed debug code

1.15d
General:
BARRACKS UPGRADES!
-- Building upgrade item will now work on barracks, increasing the number and strength of friendly creeps

Items:
// Building Upgrade
-- Reduced cost from 1000 to 800 gold
// Halberd of Glory
-- New item!
-- Made from Heaven's Halberd and Reaver
-- Same stats as Heaven's Halberd, except with more strength
-- Active ability: AoE -10000 attack speed for 4.5 seconds, 20 second cooldown

Maps:
-- Fixed spawning of top lane camps
-- Widened stairs leading from Dire jungle to middle lane
-- Fixed bottom lane shop (I hope)

Heroes:
// Antimage
-- Reduced blink to 1200/1600/2000/2400
-- Reverted Spell Shield back to vanilla
// Broodmother
-- Spawn Spiderlings reverted back to vanilla except:
--- Always spawns 4 spiderlings per level
--- Spawned Spiderlings now get a scaling damage, armor, and hit point buff
// Morphling
-- Waveform damage increased to 120/220/320/420
-- Morph attribute gain increased to 3/6/9/12
// Troll Warlord
-- Rescaled cooldown of Whirling Axes (Ranged) from 20/18/16/14 to 12
-- Reduced Whirling Axes (Melee) damage to 100/150/200/250
-- Reverted duration of Whirling Axes (Melee) to vanilla
// Windranger
-- Powershot mana cost reverted to vanilla
-- Windrun reverted to vanilla

1.15c
Maps:
-- Added two neutral camps to the top lane
-- Fixed pathing of enemy creeps in the top lane
-- Widened the stairs on the bottom lane
-- Added visible path to the store on the bottom lane

Items:
// Boots of Intellect
-- Debuff tooltip fixed

Heroes:
// Antimage
-- Mana Break burn reduced to 28/40/52/64
-- Mana Break now deals damage to all enemies around the burned target
// Arc Warden
-- Flux now affects all targets in an aoe
-- Flux is no longer muted when a target is not alone
-- Flux DoT increased to 20/35/50/65
// Disruptor
-- Increased Thunder Strike damage to 50/75/100/125 per bolt
// Drow Ranger
-- Split Shot reverted to Frost Arrows
-- Frost Arrows now apply the slow in an aoe
-- Frost Arrows now deals a small amount of splash damage
// Faceless Void
-- Illusions should no longer proc Time Lock
// Huskar
-- Burning Spear now applies the burn in an aoe around the target
// Phantom Assassin
-- Fixed tooltip of Swiftness
// Winter Wyvern
-- Reduced Winter's Curse cooldown to 100/80/60

1.15b
Maps:
-- Added two neutral camps to the top lane
-- Fixed pathing of enemy creeps in the top lane
-- Widened the stairs on the bottom lane
-- Added visible path to the store on the bottom lane

Items:
// Dragon Javelin
-- Should no longer split for illusions

Heroes:
// Alchemist
-- Acid Spray damage reduced from 15/20/25/30 to 10/15/20/25
-- Acid Spray armor reduction rescaled from 4/5/6/7 to 1/3/5/7
// Bounty Hunter
-- Track radius rescaled from 600/750/900 to 2000
-- Track gold value rescaled from 50/75/100 to 100
-- Track chance rescaled from 10% to 10/15/20%
// Chaos Knight
-- Increased minimum damage of Chaos Bolt to 100/150/200/250
-- Increased maximum damage of Chaos Bolt to 200/275/350/425
-- Reduced manacost of Chaos Bolt from 140 to 120
// Death Prophet
-- Spirit Siphon base damage increased to 20/40/60/80
-- Spirit Siphon percent damage decreased to 0.5/1/1.5/2
// Earthshaker
-- Fissure cooldown reduced to 12 seconds
-- Fissure mana cost reduced to 100/115/130/145
-- Fissure damage increased to 120/200/280/360
-- Echo Slam cooldown reduced to 85/70/55
// Faceless Void
-- Time Lock will apply bash damage and stun to all targets in a radius around the enemy
// Lich
-- Frost Nova AoE damage changed to 100/180/260/340
-- Sacrifice cooldown reduced to 35/30/25/20
-- Chain Frost cooldown reduced to 60/50/40
// Lifestealer
-- Open Wounds DoT increased to 20/24/28/32
// Luna
-- Moon Glaive bounces changed from 1/2/3/6 to 2/3/4/6
-- Moon Glaive bounce damage reduction changed from 35% to 25%
// Lycan
-- Shapeshift duration increased to 20 seconds
// Medusa
-- Mystic Snake jumps 8 times at all levels
// Obelisk Demolisher
-- Astral Imprisonment now always lasts only 1 second
-- Astral Imprisonment cast range rescaled from 450/500/550/600 to 600
// Ogre Magi
-- Ignite cooldown rescaled from 15/13/11/9 to 10
// Omniknight
-- Hammer Time replaced with Repel
-- Degen Aura now grants a 15% chance to crit for 150/200/250/300% damage
// Razor
-- Plasma Field cooldown reduced from 14 to 12
// Rubick
-- Fade Bolt no longer reduces in damage per jump
-- Null Field now actually reduces enemy spell resistance instead of buffing it
-- Null Field radius increased to 900
// Spirit Breaker
-- Empowering Haste now grants 12/20/28/36 bonus damage in addition to movespeed
-- Empowering Haste no longer grants different movespeed bonus to Spirit Breaker himself
// Tinker
-- Heat-seeking Missile target count increased from 2 to 2/3/4/5
-- Aghs Heat-seeking Missile target count increased from 4 to 4/6/8/10
// Ursa
-- Fury Swipes damage increased to 15/25/34/45 per stack
// Vengeful Spirit
-- Magic Missile damage increased to 100/180/260/340
-- Magic Missile radius increased to 250
-- Wave of Terror damage increased to 60/100/140/180
-- Wave of Spirit width increased to 500
// Venomancer
-- Venomous Gale reworked:
--- Deals damage every second
--- Strikes for 100 damage
--- Ticks for 10/20/30/40
--- Total damage raised from 75/250/425/600 to 250/400/550/700
// Visage
-- Soul Assumption mana cost reduced to 90/100/110/120
// Wraith King
-- Mortal Strike damage increased from 150/200/250/300 to 200/250/300/350
// Zeus
-- Lightning Bolt cooldown changed from 6 to 6/5/4/3

1.15a
General:
-- Satyrs will no longer stand around like doofuses
-- Fix to top lane creep pathing
-- Rapier Ogre no longer spawns on difficulties above medium

Heroes:
// Pudge
-- Flesh heap now always gives 0.25 strength per stack (leveling only increases the magic resist)
-- Fixed flesh heap buff tooltip

1.15
MAP UNIFICATION
-- All four and five player maps now use the same map (the former 5 player map)!
-- Top and mid lanes now have both friendly and enemy creeps
-- The rapier ogre exists in all difficulties, though it has more abilities in the higher difficulties
-- The ULTRA difficulty mode is back! Enemies deal 40% more damage and take 20% less damage. GOOD LUCK

Heroes:
// Batrider
-- Doubled the damage and slow per stack of sticky napalm, halved the maximum number of stacks
-- Increased duration of sticky napalm to 30 seconds

1.14g
Heroes:
// Clockwerk
-- Increased mana cost of Rocket Flare to 60/75/90/105
// Dark Seer
-- Vacuum cooldown reduced to 14, damage increased to 100/180/260/340
// Disruptor
-- Increased thunder strike radius to 400, and strikes twice as fast
// Night Stalker
-- Enabled!
-- Void deals damage in an aoe around the target
-- Crippling Fear applies its effects in an aoe around the target
-- Crippling Fear cooldown increased to 20 seconds
// Phantom Assassin
-- Stifling Dagger damage increased to 100/160/220/280
// Puck
-- Illusory Orb damage increased to 100/180/260/320
-- Illusory Orb cooldown reduced to 12/11/10/9 seconds
-- Waning Rift cooldown reduced to 12 seconds
// Riki
-- Blink Strike damage increased to 120/180/240/300
-- Blink Strike deals damage in an area around the target (including backstab!)
-- Tricks of the Trade cooldown reduced to 40/30/20 seconds
-- Tricks of the Trade duration reduced to 3 seconds
-- Tricks of the Trade strike interval reduced from 1 second to 0.75/0.5/0.35
-- Tricks of the Trade max attacks per unit increased from 5/6/7 to 5/7/9
// Skywrath Mage
-- Arcane Bolt base damage increased to 60/120/180/240
-- Concussive Shot damage increased to 100/180/260/320
-- Concussive Shot area of effect increased to 300/350/400/450

1.14f
General:
-- Mech units no longer have demolish
-- Removed the attack speed debuff from the mech catapult liquid fire
-- Reduced damage of all mech units
-- Normalized attack speed of all mech units
-- Reduced hit points of hulk units (since they now have armor and spell resistance)
-- Mech units now actually drop gold bags
-- Reduced damage of mini-slark headshot

Heroes:
// Clockwerk
-- Battery Assault cooldown reduced to 12 seconds, damage increased to 40/60/80/100
-- Rocket Flare cooldown reduced to 10 seconds, mana cost increased
-- Hookshot cooldown reduced to 40/30/20
-- Scepter Hookshot cooldown reduced to 12/9/6

// Mirana
-- Starfall damage increased to 100/200/300/400
-- Moonlight Shadow now grants 100% evasion instead of invisibility
-- Moonlight Shadow cooldown reduced to 90/75/60
-- Moonlight Shadow duration reduced to 3/4/5

// Phantom Assassin
-- Reduced stifling dagger cooldown to 8 seconds

1.14e
-- Satyr mana burn reduced from 100 to 20
-- Purge Satyrs no longer have enough mana to cast their spell twice, but will regenerate mana
-- Purge Satyrs now drop small gold bags upon death
-- Increased damage and reduced stun duration of centaur stomp