The day one patch is enormous. Hopefully they continue to plug issues post-release. They specifically mention stuff like eye reflections which is nice.
https://forums.ubi.com/showthread.php/2025380-Day-One-Patch-Notes
Jesus Christ.
Addressed several crashes and progression blockers in Assassin's Creed III & Assassin's Creed Liberation Remastered.
Improved the flow of several missions in Assassin's Creed III & Assassin's Creed Liberation Remastered.
Made some objectives clearer in Assassin's Creed III Remastered.
Made numerous graphical improvements in Assassin's Creed III and Assassin's Creed Liberation Remastered.
Improved lighting in several areas in Assassin's Creed III Remastered, especially Naval missions.
Crowd & NPC's have been improved in Assassin's Creed III Remastered.
Several visual effects have been improved both visually and to support gameplay.
Addressed and improved the alternative Outfits and character models in Assassin's Creed III Remastered.
Tweaks to the fighting system and combat mechanics in Assassin's Creed III Remastered.
A few Naval mission gameplay bugs have been addressed in Assassin's Creed III Remastered.
Cut-scene and cinematic fixes in both Assassin's Creed III and Assassin's Creed Liberation Remastered.
Numerous environment art fixes and improvements; including trees, vegetation, water and weather in Assassin's Creed III Remastered.
User interface improvements to clarify player interactions and usability (in-game and in on-line areas) in Assassin's Creed III and Assassin's Creed Liberation Remastered.
Addressed and balanced audio and volume levels in both Assassin's Creed III and Assassin's Creed Liberation Remastered.
Addressed several localization errors in both Assassin's Creed III and Assassin's Creed Liberation Remastered.
And thats just the summary, the full patch notes are gigantic.