The majority of the gmap has pk enabled and you can move through it easily because people are spread out. People hang out in Graal city not because it is special, but because it is a no-pk zone. So, if pk is enabled people with naturally migrate to the insides of buildings already in heavy use (Burger Refuge, Supernicks, etc.). When people from Graal City move inside, it will be less crowded so your argument that it will be "choppy" is no longer a problem.