Having spent some time away from the game and poking my head in a couple of times this week,
a 2 sided war would guarantee at least one "hectic" battle area meaning that the players that want to fight and experience AH in all it's glory (MMO) can always rock up at "the fight" without having to switch or go looking for it.
Unfortunately somewhere along the line people adopted the path of least resistance as the preferred choice of battle.
You wouldn't need to alter maps because there would always be a fight and let ENY continue to balance the odds.
It was weird to see Joker and friends switch from Bish to have some flights with us so IF he can bring himself to change countries anyone can. Let's just rename the Teams something else, gender neutral and see how it goes. Doesn't hurt to try it for a month or two right?