I have at least 10 Iron Mines going and none of the buildings I want to build or upgrade is getting these materials and they are FAR more important than the house upgrades currently. I have absolutely every research point and I am unable to build 50% of the other buildings because I don't have the correct factories and materials to do so. This is making the game EXTREMELY tedious and boring. This is not a matter of making the game more difficult it is simply a broken system.
However, I think the easy fix is simply to implement a feature that allows us to turn off housing upgrades. In fact, a far more in-depth system would be even better. One that allows us to further get into advanced features of turning off and on certain upgrades for anything and everything.
Whatever you decide, something desperately needs to be done.
I am literally about to give up on this until I hear of a fix. It is quite frustrating. Nothing I do helps, I am stuck in a loop of nothingness. lol. I have basically spent the last 1 - 1 1/2 hours just watching houses upgrade and upgrading research. Now research is maxed there is nothing else to do but look at the screen and hope something happens to benefit me. Basically I can't get anywhere past a cement and glass factory because houses won't stop upgrading and using all the materials I need.
With that said, another good idea might be to make a priority button for upgrading buildings.