With the economy update we received numerous new crafting stations, among them two for smelting: the heat & fuel efficient furnaces.
Given the abundance of fuel available there is currently little to no reason to ever use the fuel-efficient one.
My suggestion would be to add two specializations to t4 smelter thralls:
[Metallurgist] Provides the benefits of the heat-efficient furnace when placed at a fuel-efficient furnace.
[Stoker] Provides the benefits of the fuel-efficient furnace when placed at a heat-efficient furnace.
Depending on which players encounter, they’d use a different furnace.
I’d suggest the same for the carpentry stations, but that would probably cause issues with the specializations they have already.
Thoughts?