The beta apparantly is 1/3 of Act 1. Diablo II had 5 acts. The game world is going to be pretty large and this game is a hack/slash/loot game. The auctionhouse addition is going to be cool. No more scamming.
I don't think PVP in arenas will be fun for me. It's going to turn into MF PvM so you can pvp in arenas for mounts...Similar to another blizzard game...
I'm still not sure if I'll buy this or skip it. The most appealing thing about Diablo is the fact that it's not a monthly subscription.
Someone sway me one way or the other.