it might be nice to "connect" buildings so if a building runs off of the other buildings resource. so u could connect wood cutter to a charcoal pile. and the price to upgrade would reflect the price of upgrading all of them so the main building (in this case the charcoal pile) runs at 100% basically making them function as one building. even maybe collecting to completed resource from any of the buildings
building need upgrades. like u can build in a recycling plant on the glass factory to reduce sand upkeep. or maybe like a research thing so u could research "supplemental wind turbines" that would make every building produce some power and lots of other stuff like that. floating wind farms and other stuff. other then that i like almost everything except... ur building that performs wireless power transfer is build entirely out of non conductive materials?