I'm on PC and smooth sailing so far since launch day. Well, MP doesn't work me when I tested it, I always freeze at the start, even when I took off the command line for the frame rate but then I'm not interested in the MP. No big loss there.
There are occasional hitches in dialogues, still. And it is a bad idea to immediately create a PC if changes to the Keep are made in-game because the toon will get stuck in the Fade. The prison cutscene failed to kick in. I had that happened twice in a row before I cotton on and shut down the game and restart.
I've to say there is an annoying combat mechanic when it comes to fighting giants. Even when they lifted the rock above their heads and you run to their backs, the rock will still hit the toon. Even if your toon is standing on a cliff, above their heads, the magic rock will still hit the target. What is the point of dodging when the rock has a missile lock on you?