It is very nicely designed. A bit compact compaired to the other dungeons where the mobs are much more split out but the game was missing something like this, a true gauntlet if your trying to run for your life. The only problems I had before the patch was
The spot near the leeching devils on the left side there were wayyy too many mobs with nearly no respawn time so you can find your self swamped within seconds if you don't run passed it to a safe location.
The graveyard where the reaper of life is... a reaper of life a lone is pure death but I don't think theres a place to pull him since where he spawns and everywhere around him you'll constantly get swamped with lower level mobs.
The Dragon seemed a bit un-fightable if a straight fight unless your entire party had a full set of resist magic gear and you had a lot of healing wizards. (Has been fixed judging by patch notes)
None of these are bad things that should be changed they are fine as is, this how dungeons are in games.
I do like the obsidian elementals and especially the oozes that split :). As well as the wolves might be a good spot to farm for leather now since trying to max out leather working it takes ungodly amounts. Lastly with this dungeon one can now farm ghosts! They were one of my favorite things to farm since they had soo little life and you can some times kill them without getting hurt too much.
Also nice tapestry at the top left of the dungeon, I wish those were obtainable for my house and rugs as well.