Procedural generation has come a long way, FD has shown some skill in this area as well...Atmospheric worlds with cities would be so complex that I just don't see it happening.
It might be possible but the scope won't be amazing. I'd sooner take one or a couple fleshed-out non-procedurally generated settlements on important worlds like Earth/Mars and so on.
Pretty sure spacelegs would break down in this regard to "better stations/bases".