Material input vs output
I feel like there could be some improvement in how much of a certain thing you get out compared to how much you put in. Take the fish for example, when I cook one fish, I expect to get one fish back, not a third of a fish. You could even get several meals or portions out of one fish. Just a thought.
you can add skill points into efficiency to improve yields. so if you cook 3 fishes and only get one, it's saying you're a bad cook and ruined two of the three fish. while later on you might be able to get 2 meals out of one fish.