[llamabeast]

Really like your map Aezeal.

I wonder if it might work to have a couple of provinces per planet (even several on the larger planets), and have inter-planet transport only possible by using spaceships. Within a solar system, nearby planets might only be separated by one space province, so they could use short-range transports with sailing to get them between worlds. Between solar systems, long-range transports would be needed. These would be amphibious vehicles which granted water-breathing to the units they led.

I wonder if it might be best to exclude spaceships from ground combats? Or rather make them ineffective. They could have landshapes which represent them landed on the planet's surface. They would be unable to fight, or at least unable to move. Capital ships might even be aquatic, and hence unable to enter a land province at all.