The quest itself is fine. Only 2 problems:
1. The room with the spikes and air jets blowing around. All fine, get rogue to disarm jets, not fine is the completely random 15 signs with 100k hp. Compare that with spikes that have a DC 45 will save. Needless to say, took my fav soul a long time to beat it down with the others watching.
2. All those chests and not 1 seal? Come on Turbine, this quest has the same difficulty with that of Chains of Flame. At least make it so the drop rate on the seals isnt less than 1%.