Is there at all a possibility to have a version where the amount of ore you get is heavily reduced when it runs out? Having max production means you need one or two mines for the entire game. On the other hand, super late game it's no fun when all you do is expand to supply your base with iron for another 20 minutes. If, rather than running out, you got a significantly reduced amount when something is mined out, then you would still have to expand but not to such a degree.
