Ubisoft announced today that they have decided to delay the release of the latest promised patch for Assassin's Creed Unity. The patch was tentatively slated to arrive today (Monday, December 15) and it promised to bring with it stability fixes and other improvements. The latest from the developer indicates that they are still working on some issues and have decided to delay the release of the patch until further notice.
Rigorous quality control is of paramount importance to us, and your feedback over these past weeks has indicated that it is important to you as well.

As stated last week, we’d expected to release the patch today (and we know that many are anticipating its release), but we are choosing to hold off until we can give you the improvements we’ve promised. We are committed to delivering major performance improvements, which requires that we refurbish the Paris map and that will take a few more days to hit the high level of quality our players deserve.

Call me crazy, but maybe this game shouldn't have released when it did.