+1 to the notion of making a team capture-the-flag/zone-control event!
(shuffle the players for better gameplay)
anyhoo, (although i don't WOE here) i think the original WOE system (although messy, uneffective, etc) is good enough as it is because it really makes you go through the whole castle and enjoy the walk a little bit. And all the nooks and cranny(s) could be used as part of the attacking/defending strategy...