If you play something like Assault Squad 2 in multiplayer both sides have to actually log in and set things up to ever HAVE a battle. The PB timers increase the chance there will actually be a battle, instead of 20 minutes sailing around in an empty instance admiring the view of town. (only a chance mind you, since most of us have numerous meatspace commitments) Nevertheless the singular port battle model leaves a lot to be desired because even WITH the timers few players will be available to participate...I'd like to see RvR as prolonged OW campaigns of some sort, but it would take some deep thinking