Here’s an idea for SE, and that is adding physical contact binary stars. I didn’t see this on the To Do list, but that doesn’t mean it wasn’t implied. If so I apologize.
It will be, but probably not right away. SpaceEngineer specifically said this about them:
QuoteSpaceEngineer
...for close and contact binary stars, their shape must be not even 3-axial ellipsoid, but Roche zone shape, that is I think impossible to combine with Bruneton's atmosphere code. So I must implement my own atmosohere code for stars first.