DriveClub didn't have any significant issues in singleplayer mode except were asynchronous multiplayer face-offs didn't load or had ridiculously unobtainable scores. Aside from that there were some crazy crash physics. For a racing game it is very polished. I've not seen any clipping through the map or flying out of the track type glitches in DriveClub yet.
I haven't played AC:U or MCC. AC:U had some crazy issues that were fixed... And the games FPS never looked too bad at least it was never unplayable FPS . Halo on the other hand is a major highly anticipated franchise with it's most important mode still in ruin... So I have to say it gets my vote for the worst most publicized mess of 2014 and potentially 2015 if it isn't fixed by June.