I would love if there was a mechanic where we can craft literally any item as long as you have the knowledge, materials, and requirements. It would be amazing if the game included an analysis system to figure out how to copy and modify an item like analyzing a spell scroll for one spell and making a spell scroll for any spell you know or adding stat buffs and skills and/or spells that anyone can use while wearing them. It may need to be a pretty comprehensive system but I would love if the game includes something similar to that. It would be great to make custom equipment and consumables for your party or wares.