Well, I did suggest to a couple of our guys, that if we had enough of the Ossus maps, it might be fun if everyone for the whole tournament had to play on those maps only, but it might really hurt anybody who pulls two big melee pieces vs. people who pull one or two of the big shooters (i.e. Han mostly).
Otherwise, it really just depends on what I get in my 2 boosters. If I get a couple of great shooting pieces, I typically will go with a more open map. If I pull mostly good beatsticks, then I'll chose one of the more closed-in maps. It really doesn't make THAT much difference. Although one thing that will make a difference for this release tournament is the Elite Rebel Commando and Override, since there are no other counter pieces in the set (no Satchel Charge). So, you'll either need to run your own Elite Rebel Commando (if you pulled one) or hope to play on maps without many doors. Just be really careful about that guy.