I'm disappointed the beta was so poorly optimized. According to numerous accounts, it was almost entirely CPU bound.The game was totally unplayable, for me. It was like swimming through choppiness, sorry that's the only example I came up with off the top of my head. I'm really bummed I was looking forward to this beta. Hopefully, I'll be able to partake in the next beta and it'll be better.
There was a warning about performance in capital red letters on the official forum before the beta started...
I got between 60 and 3fps, more often 20-30, but since they warned us about the complete lack of optimisation at this time, I really didn't care.