I tried to play the Beta today, but gave up after trying to fix some of its problems. First is rebinding the keys. It's the same issue as it was with the BF3 beta, you have to join a game to rebind your keys, then get kicked for being idle and start over. There's a bug when rebinding, while rebinding heli or jet controls, it writes several duplicate lines until the config file gets too big (64MB) and crashes the game.
Once I realized what was going on and just rebound foot controls, I couldn't get rid of the stutter. I'm getting good FPS, but the game stutters every 2-3 seconds making it unplayable. Some forum posts say to use task manager and setting the game's .exe to low CPU priority or set the affinity to use two CPU cores. Setting it to low priority does help a little bit, but it's still unplayable. Setting the affinity two two cores dropped my FPS to single digits.
"The only way anyone can live in peace is if they're prepared to forgive." - The Doctor