Frankly speaking, I think this was not a good way to implement a simple way to turn your fire green. I was hoping for a minor glyph, or something simple, but that's not happening. I'm kind of disappointed really after all of the work myself have and others put in this week watching spawns, leading groups, correcting bugs with the quest drops.
Just a heads up.
How to fix: Make the item drop in raids, even LFR, and not make it BOE. I see warlocks selling them at astronomical prices. Kanrethad, I'm told, is difficult by himself. There's the challenge. Not waiting for hours and hours and hours on end.