There's things on mount base, such as a prop that launches people and can send them off the map, a secret that can allow a zombie to hurt others and it can't be killed all this is fair game, and I believe a map specific rule should be added making it traitorus to let the zombie out and hold the prop that can push others off the map when touched with it.
I actually quite like the map tbh, just has some flaws but if it got a even better map in it's place that'd be cool. XD