I wish there wasn't a crafting UI at all. I'd prefer a system where there was an option to 'use' an item, by rightclicking on it in your inventory. So if you want to craft something, use the proper tool on the materials in the proper order. If the craft requires something which you can't carry (like an anvil or a loom) then you should have to use the materials on that. And all these 'use items' should have an animation in the game, like you see your avatar using the loom or smithing a sword on an anvil. Crafting UI with windows is very immersion-breaking to me.