Got into the beta today, and it's quite fun. Can't wait to play single player.
I don't like the missing channels/chat rooms though. I know a lot of it was pretty much just open season for spamming, but there were useful sides to it, like finding clans of people to play with easily. Feels like it will be more disconnected, like it'll lose that general sense of game community.
Also, I played it on my PC and Macbook. PC I could run it at near-max (Ultra on nearly everything) just fine, looked great. Surprise when I ran it on my macbook and even at the default all-low settings, it still looked rather good. And the framerate was 60fps! I was actually able to crank up the texture settings beyond what they say it should be, which significantly improved the quality of the game, without a major impact on framerate.