Ubisoft is outlining upcoming Assassin's Creed Unity updates on a newly launched Live Blog that addresses the game’s issues.
As detailed on the blog, Ubisoft is currently working on the next Assassin's Creed Unity update that will help address the following:
Arno falling through the ground.
Game crashing when joining a co-op session.
Arno getting caught inside of hay carts.
Delay in reaching the main menu screen at game start.
Ubisoft is also looking into other issues players are reporting of having with the game. The most widely-reported problems that will be addressed in future updates include issues with frame rate, graphical and collision, matchmaking co-op, Helix credits and more.
http://www.ign.com/articles/2014/11/13/ubisoft-details-assassins-creed-unity-updates-on-a-new-live-blog