no time to read it all... I suggest we keep the simple orbit mechanics, just for being user friendly. I have talked to some people, that liked the game trailer from kickstarter, but are not into super heavy RTS. They fear, as do I, that multiple planets will not be easy to manage. Add a realistic orbital layer and it will get even harde. Maybe, after the multiplanet support is in, we may think about how to modify orbital units.... And on a second note, they have probably antigrav engines, which means, they can go in what orbit they ever want.