It would be great to have a crafting process that works the way timber currently does, where you cut up a tree and you get both a log and branches, for example.
I'd love to be able to do something like this for modding, for example when making cheese you get whey and curds, which can both be further used in recipes. Ideally option for modder to specify parameters (nutrition, weight, item type, etc) for each output. This could also be used to mod in recipes where an ingredient is tied up for the duration of the crafting timer but is returned to the player afterwards, as in cords when drying meat.