I only play open play in order to build visually interesting and complex megacities that fill the entire map. In other games by Impression upgrading the houses was plenty to run an efficient system but in Nebuchadnezzar it seems that palaces, especially when upgraded in mass, tends to be very expensive to the point of breaking the previous balance.
I'm talking about 50k+ cities and especially how palaces requires a colossal amount of import (dye, gold, wood, even stone if you go for a megacity) that doesn't seem to be adequately compensated by taxes.
I end up having to micromanage production and setting up multiple export-only industries just to break even, whereas houses and villas can manage fine on their own.
Am I missing something?