Where did they say you couldn't go back and replay a map?
Anyway, my biggest worry is that people will try their very hardest to play Brink exactly as they played MW2 and other very un-Brink-like shooters. Brink itself will be fantastic, of that I have no doubt. It is the community that I worry about. The people that, despite all of SD's work against them, will be total jerks just to ruin it for the rest of us.
However, I'm not even all that worried about that, to be honest. The better a game is designed the more well-behaved the players seem to be, and Brink looks to be very well designed indeed. I do think that perhaps some matchmaking search options (yes, like Halo Reach) should be put in to separate the super competitive from the dudes that just like to chillax, if something along those lines isn't in place already. :goodjob: