I feel fell-spawn drop rates should be increased tad bit due to the difficulty and requirement a gold key to unlock the dungeon. Like other key bosses there is always an instance of some sort of gear drop per lets say 5 runs. Fell spawn is the only dungeon you can run 20 times and have no gear drops whatsoever. Now i understand this is to elevate the idea that the gear sets are already made for crafting, but if your gonna implement a way for players to spend their time farming instead of crafting, then it shouldn't be a motive to side swipe them into thinking it should be made harder.
I like the idea of pushing people towards a crafting direction etc, but please remember its still a kids game played by adults and no kid is gonna spend hrs on hrs trying to farm endlessly for days, or even weeks for one or two pieces of gears. I was already quite fortunate to craft 4 of the 7 pieces of my full dragoon set, but my empathy goes out towards those with more than one accounts and have all 7 schools to grind for. Farming dungeons should feel rewarding and not a feeling of headaches or makes you just wanna through a fit against the computer screen.