I looked around and I was surprised not to see this suggestion already! The suggestion is simple; to be able to exchange the feathers for the demonic scales used in the hell shop, and vice versa. It could even be at the same 2:1 rate that the blood beetle exchange is for. If not feathers for scales or vice versa, than at least feathers/scales for blood beetles.

At the moment, I have 60 feathers that are probably never going to be used. Not this year, not the next, probably not even the one after that. I am aligned with heaven for angelic blessings, and Nirah for crunchy worms. If I could turn them into scales or beetles, I would actually have use for them. But I can't do anything with them, and they just keep piling up uselessly.