The problem of fort types

[Sombre]

So we have general agreement. Does anyone have any other ideas on how this could be improved?

I'm sticking with my idea of a flat rate for all non special forts, discount rate for specials. That way the best option is usually to go with your racial fort, next best is somewhere like a high gold or high income province, then finally you still might build a 'crappy' fort due to location (like to protect a lab and temple on top of a special site). So you'd get variety and fort choices would be more intuitive, with crappy forts being the rarer choice rather than the other way around.