9.0 preview (hopefully final update before release):

Further refined Covenant projectile effects
Adjusted projectile effect priorities
Adjusted vehicle effect priorities
Slightly zoomed out camera in most cutscene shots
Adjusted lighting and brightness in several cutscenes
Fixed some missing particle tags

9.0 preview:
Updated level image for Composer
Refined all Covenant projectiles to be more consistent in appearance
Made AR and all Covenant projectiles able to explode grenades
Increased velocity on Shade turret projectiles (with AI velocity scaled to compensate)
Fixed broken facial animation for Cortana's reflection in Shutdown
Adjusted materials on Storm Rifle
Slightly reduced velocity on Storm Rifle projectiles
Adjusted damage states and effects on Ghost and Banshee

Rebuilt maps

9.0 preview:
Fixed broken facial animation in ending cutscene
Fixed broken skyboxes in Midnight
Fixed Broadsword exploding when turning too tight/flipping
Improvements to color grading and brightness in Midnight
Improvements to metal materials in Midnight

9.0 preview:
Adjusted brightness, fog and color grading in spire interiors on Shutdown
Adjusted brightness and color grading throughout Midnight
Adjusted some particle effects in Midnight flight section
Adjustments to Cortana's appearance in ending
Very slightly reduced AI grenade chance scales

9.0 preview:
Removed bad choice for Chief line in crash scene on Midnight (I didn't remember the delivery of the line accurately)
Restored the original lines for the crash scene on Midnight (adjusted timing, might adjust a little more)
Enhanced and adjusted many particle effects on Midnight
Greatly sped up Broadsword chaingun projectiles to fit better with the missle speed
Tried to fix weird bug where some portals are invisible

9.0 preview:

Overhauled Cortana's visuals (should be the last time)
Fixed Wraith's projectile (for real this time)
Fixed missing Energy Sword effects
Added subtle vignette to all cutscenes
Changed resurrection particles for post-Didact Knights & turrets to be orange instead of blue
Changed Watcher birth effect for post-Didact Knights to be orange instead of blue
Tweaked visuals and alpha values of many particle effects across the levels
Added flashlight tutorial prompt on Dawn
Replaced Chief's line on Dawn about the "Covenant being more fanatical" with Cortana mentioning reenforcements
Adjusted fog distance in first cutscene on Requiem
Darkened and adjusted materials on Mammoth
Adjusted brightness and color grading in first cutscene on Shutdown
Adjusted brightness in Tillson cutscene on Composer
Restored Cortana saying "Look out" in crash cutscene on Midnight
Added Chief telling Cortana to arm the warhead in crashed cutscene on Midnight
Fixed weapon loadout after crash on Midnight
Added Chief calling for Cortana after crash on Midnight

9.0 preview:
Updated level images
Fixed Chief teleporting in on last cutscene on Infinity
Fixed fade in at start of Reclaimer
Removed biped spawning effect (for Campaign only)
Adjusted Banshee primary cannon damage on Phantoms
Adjusted Sticky Detonator explosion damage & radius
Fixed Wraith projectile effect

8.2 preview:
Adjustments to some cutscene visuals
Adjusted scripting around Didact cutscene & final escape sequence on Forerunner (should have no more short freeze before cutscene)
Fix for final cutscene on Forerunner
Adjustment to SAW death impact on Elites
Adjustment to plasma pistol charging light
Reduced Fuel Rod Cannon damage

8.2 preview:
Overhauled many weapon effects and particles using assets from H4 and H2A
Overhauled Needler (yet again)
Adjusted materials on all Covenant weapons
Slightly darkened and adjusted Cortana's appearance
Fixed BR not using correct scope HUD
Adjusted Phantom explosion effects
Increased blood spawns from melee
Adjusted shotgun death impact on Elites
Adjusted melee acceleration against Elites
Adjusted melee acceleration against Grunts
Reduced Knight melee damage
Fixed assassinations not working on certain variations of enemies
Added letterbox open when using rally points
Adjusted timing on "One thing at a time" and "Landing craft, flanking us!" on Dawn
Trimmed the animation of Covenant landing on Dawn so they're active as soon as they drop
Added more props in area before airlock on Dawn
Fixed script and trigger volumes for Cortana's elevator quip on Requiem
Fixed fade in at beginning of Forerunner
Adjusted flashlight logic and extended length of time it stays on
Tag cleanup, consolidated many of the H2A tags I've been using into their H4 locations