Make Planets Wraparround!
Also, in Frontier the systems are based on I think Inverse Multiplictice to distance/whatever to make them look big enough. Maybe have space combats and ability to auto-resolve combat with planets acting as an over all city.region or you can zoom in for stories or if you want to reduce casualies.
So maybe "Hazfar" (Desert Planet, 1 City, 5 Outposts, 10,000 Droids and 500 Big Guns. Resource: Spare Parts, Yucky Gas)
Zoom in for the battle: 100 Droid Units and 5 Artillar Units on a map with a large stretch of desert and 1 City and 5 small cities. There are a few mines and 1 space port.
That wold be hard to implement though... Maybe 5 battle turns then do the overall turn, then battle turns?