So I think it is great that I can leave things in the oven for ages and they always come out perfectly cooked, but I was thinking, what if we got a small bonus for taking things out right at the right time, within seconds of it being finished that gave us a small bonus, say 5%. To make it harder to get you could make it so that "a watched pot never boils", ie if you are looking in the oven or pot then items will not cook so you can't look at it and remove it as soon as it changes, you must set a timer and open the door right when the pies are ready. This could be coupled with another bonus for eating freshly baked food, any food that has just been taken out of the oven receives a 2% bonus if it is eaten while still hot/warm.
The same principle could be applied to the smelter, if you quickly empty and refill a smelter then you need 1/3rd less fuel as it is already "up to temperature".
Perhaps the bonus I have suggested are too powerful, or not worth the effort if the window of opportunity is too tight. But I thought it would add a nice skill based twist and reward players who put in a little extra effort.