While good suggestions, I see this highly unlikely to happen in the current game. Each variant would require 50+ generations of a single CG . It is part of the reason there are no customisations in game at the moment and why pregnancy will not be a system. It is just too much work for a single developer.
This type of stuff should be thought out though if we get a Starmaker Spinoff after 2.0. It would be great to have a systems where you can customize your own Star from top to bottom, or influence them down a full light and dark path.