There is a lackluster list of drops available in game, they should be expanded on with some rarity tiers.
Meat is cool, but what cuts of meat? would add variety to the cook by expanding his options, and healing parameters of each cut.
Fur's are cool, but all we can do is sell them. Leopard Bandana? Coyote Bandana?
Scales are cool, how about some lizard boots and pants.
common key drops from monsters, not just bosses.
maybe a trader NPC to trade furs,feathers,scales to for notesheets?