All trees
- The starter perk in most combat trees has been changed from +25/50% -> +20/40%. This change compensates for stronger perks down the line compared to vanilla which frontloads most of the power of each perk tree into the +20/40/60/80/100% starter perk. The following trees are affected:
--- Archery
--- Heavy Armor
--- Light Armor
--- One-Handed
--- Sneak
--- Two-Handed
The -35/50% casting cost starter perks in mage trees have not been nerfed because the base cost of many Skyrim spells is very high and includes the assumption that there is a perk that halves casting costs, so nerfing this perk would only encourage players to avoid standard mage builds and instead look for ways to avoid paying the casting cost altogether (-100% casting cost enchantments, Vancian Magic, Ocato's Recital and other autocast effects, etc).

Alchemy
- Poisoner: changed from +50% -> +1% per Alchemy level.

Archery
- Deadeye: standardised description.

Destruction
- Conflagration: reduced burn duration from 4 -> 3 seconds.
- Cold Cathode: reduced damage bonus from +40% -> +25%, increased threshold from <20% -> <25%, if you have Vancian Magic it now (only) activates at 20 or less slots instead of being active all the time.
- Pyromancer Ascension: reduced ascended damage bonus from +150% -> +100% (and fixed buff description saying +200%).
- Runecaster: reduced range bonus from 150 -> 75 feet.
- Thermal Shock: reduced damage bonus from +30% -> +25%.
- World in Flames: reduced environmental fire damage bonus from +50% -> +20% and fire damage bonus to enemies affected by them from +50% -> +40%.

Enchanting
- Enchanting Mastery: increased from +15/30% -> +20/40%.

Illusion
- Enchanted Hour: now correctly increases the duration of illusion spells x3 instead of x2.

One-Handed
- Go for the Throat: reduced bonus damage per Wolfstooth stack from 75% -> 50%.
- Rise Kinsmen: fixed description to clarify the user does not get the bonus.

Restoration
- Burns the Sun: increased damage bonus to affected targets from +75% -> +100%.

Sneak
- Replaced Serpent's Betrayal with Whispering Death.
- Backup Plan: increased duration from 30 -> 60 seocnds.
- Smoke Curtain: now also grants +50% sneak attack damage to targets in the cloud.

Two-Handed
- Death or Glory: standardised description.
- Flee Fool: increased damage bonus to fleeing targets from 40% -> 50%.

Alteration
- Vancian Magic: now also works on spells that aren't correctly flagged as school spells.

Smithing
- Dwarven Autocannon: increased damage from 15% -> 25% of Smithing skill.

Conjuration
- Renamed Damnation to Corpse Gas.
- Ghost Armor replaced with Dark Whispers: armor +20 -> armor +15 and damage +5%.

Destruction
- Ancient Seals: reduced damage multiplier from x6 -> x4.
- Iced Earth: frost hazard damage now lingers for 1 -> 3 seconds after leaving the area, and additionally you deal 50% more frost damage to targets affected by this.

Smithing
- Dwarven Autocannon: listed duration is now correct.

Alchemy
- Advanced Lab: no longer grants the buff semi-permanently when you activate an Advanced Lab and it gets cancelled before you can enter the menu.

Enchanting
- Gem Dust/Preserver/Arcane Nexus/Miracle: no longer grants the buff semi-permanently when you activate an enchanting table and it gets cancelled before you enter the menu.

Light Armor
- Wardancer: reduced excessive XP gain.

Smithing
- Advanced Workshop: no longer grants the buff semi-permanently when you activate an Advanced Lab and it gets cancelled before you can enter the menu.
- Dwarven Autocannon: the cannon can now be Activated to scrap it, explosion is much quieter.
- Heart of Creation: no longer erroneously accepts anvils (because anvils have the forge keyword).

Conjuration
- Ravenous Dead: now grants +50% level cap to reanimation spells.

Light Armor
- Iron Fist: "in combat" check improved.

Sneak
- Dynamic Entry: now grants a small amount of Sneak XP..

Conjuration
- Rat King: clarified description about sneaking.

Enchanting
- Gem Dust/Preserver/Arcane Nexus: now activated on objects with keyword WICraftingEnchanting instead of IsEnchanting.

Smithing
- You can now put 2 points into each smithing unlock perk to get both materials. 1 point still lets you choose between them.

Misc
- Updated ASIS blocklist.

Alchemy
- New perks for offensive alchemy.
--- Added perk: Elemental Oil.
--- Added perk: The Alchemist's Cookbook.
--- Added perk: Walking Disaster.
--- Don't ask for the ability to throw oils like grenades. This causes issues where the oil puddles levitate in mid air if you hit a tree.
- Poisoner: increased bonus from 30% -> 50%.
- Witchmaster: clarified description.

Alteration
- Spellblade: now only activates when you cast a spell with one hand, preventing the buff from interfering with dual cast detection (the game only takes into account the most recently cast spell).

Destruction
- Stormlord: proc now correctly cast from PlayerRef, meaning it works again.

Light Armor
- Tempting Fate: no longer triggers out of combat. (Fixes a race condition.)

Smithing
- Major tree overhaul for compatibility reasons. Any skill points invested into impacted perks will be refunded.
--- Smithing Mastery no longer increases all tempering effectiveness.
--- Unlock perks removed and replaced with *Smithing perks (eg. Meric Smithing) which let you choose between two unlock perks.
--- Unlock perks once again double your tempering effectiveness.
--- Tempering items is now harder: fSmithingArmorMax and fSmithingWeaponMax changed from 10.0 -> 6.5 (but this is compensated by the replacement of the +50%

Smithing Mastery perks with the +100% unlock perks).
- New perks for offensive smithing.
--- Added perk: Dwarven Autocannon.
--- Added perk: Electrobolt.
--- Added perk: Remote Control.
--- Added perk: Firing Line.
--- Added perk: Spin Up.

Sneak
- Cleaned up the tree.
--- Cloak and Dagger: no longer requires Demolition Mission as a prerequisite.
--- Problem Solver: no longer requires Backstab as a prerequisite.
--- Quiet Before the Storm: no longer requires Spot Detection as a prerequisite.
- Problem Solver: now works with any weapon or fists.
- Serpent's Betrayal: changed from +50% sneak and +50% weapon damage -> x2 sneak and x2 sneak attack damage, but no longer stacks.
- Sneak Attack: damage bonus with non-1h weapons now works with any weapon or fists.

Light Armor
- Tempting Fate: no longer triggers a sound detection event.

Speech
- Encore: no longer results in a duplicate Perform spell after you save and reload (note: this change is not retroactive unless you unlearn and relearn the perk and Performer).