I suspect that this is a suggestion that's already in the works, but many creature entries in the Hiergamenon mention that their body parts are prized by alchemists.
I'd like to see those parts, once they're in the game and dropping, used not just as salable items for gold, but reagents in the alchemical creation of items and potions of power. Perhaps even spell reagents. Alchemy tech would certainly spice up the magical technology tree.
