i seem to remember this kind of thing coming up at irregular intervals in the past. one of my own suggestions to this effect was that some maps could have different kinds of "neutral" buildings that you could either destroy or capture and use for your own, depending on what the map was like. for instance, a map set in a deep jungle could have some ancient, generic ruins that you could capture and, depending on what the ruins are styled like, use them to fill the roles of various other buildings (temples of course come to mind, but it could include barracks, fortresses, etc.). another was an inn, which could/would be used similarly to a Civic Center. ideally, each building would only roughly fill the role of an "actual" one, such as the aforementioned inn only being able to train citizens and basic soldiers, while an actual Civic Center would be needed to research technologies and advance to the next Phase