What's the benefit of leveling cities, exempt getting bigger people pool for army, and unlocking new buildings.
Currently, in my game, I have several cities that don't produce anything that would benefit them elevating to 2nd level. No gold, no iron, no higher level buildings worth building. Isn't it just better leaving them at 1st level, to not eat extra food they don't need.
Exempt if there is some hidden benefit of having them at higher level.