Tyrannicon made a video, to be honest a funny glitch montage as Billy Hashtag looking only the positive side of things.
The PC version of the game had very many bugs and glitches in it, which was not surprising for many given how Ubisoft optimizes its games upon release. Later on most, if not all will be fixed through updates and patches, so now we have quite the opportunity to praise the developers and record many funny and also some frustrating moments.
Personally, I have played with the Xbox One version of the game, in the 40 hours I have put into it, I had only some minor issues and also 5-6 crashes. The overall gameplay value could not suffer from the few problems and bugs.
The PC community on Steam must have much more problems than the Xbox One or the Playstation 4 players, (like with Battlefield 4 which isn’t really buggy at all on Xbox), because the developer team could not optimize the game and the engine for every single configuration out on the market. But my opinion is that they could put more of their time into general fixes and performance optimization. Let’s see some of the masterpieces out there.
I do believe that these issues are just temporary and the team at Ubisoft is already hard at work fixing them. If you were following the updates for Unity on other platforms, they are releasing major updates to fix most of the known problems.