It may have been mentioned before I returned back to Runescape, but I've noticed while players are Smithing away, why on earth do we have to waste time having to keep on right clicking the heat forge to add another item, when we could just simply add an X to how many items we wish to make like they do in OSRS?
Could be an unlockable for the forge to always stay hot as long as you have the orthen furnace core and all unlockables at artisans workshop then you can unlock one more to make the forge like what you described.