The current method of limiting crucible space strongly limits the amount of alloys that can be made at once, if you want to keep the limit of 2 ingots per crucible and allow for reasonable amounts of alloy creation you may want to add a method of creating alloy blends? Preferably just by combining nuggets in the crafting grid, slow methods like manually grinding in a quern earlygame wouldn't feel good for something that should realistically be possible by default (by which I mean putting 40 nuggets of differing types into a space that can hold 40 nuggets, not making alloy blends).