The video performance is still very poor. I still haven't figured out why that is so but I know that people in the beta were already talking about it. Even with high end computer the game seems to be very sluggerish. Some people said it runs smoother when you run the game in windowed mode but I don't really see a difference. One thing I don't understand is the vsync: I turned it off but I still get stuck at 60 fps (vsync is also off on the nvidia control panel). Note that I have 50-60 fps most of the time but it's still lagging.
Another thing is that the youtube-upload function is pretty cool but the end result is rather disappointing