I would like to do Grizzled more but the quest items drop so infrequently that it's too much effort to go through. It's dangerous down there, and you have to kill over and over again, and the quest items hardly ever show up, and when they finally do appear the decay timer on them is too short.
The actual keys to get in have a really long timer but the quest items to get the keys is short, go figure.
I wonder if they accidently reversed the intended timer durations on the keys vs. the quest items to get the keys.