Now that the rooms inside of areas understand where they are in relation to
the maps (kickass feature), navs could get an 'exit' spell. This would simply
take their party to the entry point on the map for the area they are inside
of.

Give it the casting time of dimdoor and it should be a pretty nonabuesable
convenience feature. Dimdoor will remain the zap of choice for eq parties that
know they'll be facing blockers.