It seems that any one guild in Guild Wars 2 can only control one location in the Mists at once.
This is a feature of Warhammer that I loved. It gives you a sense of ownership and greater immersion.
Holding your keep against the enemy Hordes is very satisfying.
Mt only concern is whether a cordinated group can withstand the assault of superior numbers or do numbers always win?
Any way it brings back memories of this our favorite keep in Warhammer.