The ones we have now are way too big, most of them use almost a full foundation block, would be nicer if we had smaller ones, occupying less space and costing less materials, to balance those advantages they should have limited inventory, maybe a slot for the fuel, two for the raw materials and one for the outcome. If that still isn’t balanced we could even look to cut the ability to put thralls in those stations.
The visuals could be minimalist, the furnace should be something similar to a sword forge, or those smaller ones made of clay. The blacksmith bench should consist only of and anvil and a tall bucket, an argument could be made by saying that the forge needed to heat the metal is not connected to the bench itself. Anyway, you get the idea… what do you guys think?
Ps: This is also a good idea for a mod, I’ll be looking into that anytime soon.