It really will depend on how much exp u get in a BG. If Blizz wants to allow players to level exclusively with PvP, then it will be comprable to questing. If they just want a little exp to be gained with pvp, and nerf it, then you are probably better off doing 2 5 box teams, one at a time.

Anyone on the PTR able to comment on the amount of exp u get in BGs?