Dungeon Room Chokoe Points

I am just entering a dungeon encounter rooms screwing around helping Taz.

I notice that almost every room has an entrance that funnles / gathers the spawn. These are going to be way to easily manipulated and worked. High end players are just going to park one of their crazy tanks in the entrance and back them up with ahhealer and AOE.
Bad design, Entrances need to be more discombobulated and make players enter the "Arena" and the spawn needs to be curtailed from gathering in clusters, leashing is ok but . . . .