What a waste. In their current form, no one is going to do a dungeon knowing what they're in for. There are two major problems with them right now, from what I've been able to experience:
#1. You can't leave.
#2. Enemies respawn extremely frequently.
Because of these, dungeons are deathtraps that lure players in with promises of loot that they can never receive. It doesn't matter what loot you could get from them because you will never get out.
I suggest adding multiple exits throughout the dungeon, removing the enemy respawn and the loot respawn.