The conversation on the mechanics is happening on Putting features on the Campiagn map (custom tiles) (sic).
The resurrection of which, by the way, we're all grateful for.

eadingas didn't say it was unfeasible. It appears that customised cities can be implemented, however as they are a customised tile they lose their relationship to the strategic version of the city. So that if you build a temple on the strat map it won't appear on the battle map.

At this point it appears to be a trade-off, do you want your cities to be customised or do you want them to be generic but properly reflect the buildings built on the strat map.

I would imagine the best course of action would be a compromise. Generic, organic cities for most, customised cities for the more important, unique locations. Even people who wanted to keep their vanilla cities in the stratgeic would be interested in a custom tile of an ancient city (or even a section of one) as it could be used for new historical/custom battles.

A different problem, though, would be how to implement the siege rules (victory by holding the central plaza, defending units rout there and auto-rally) for the custom cities.

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