It sounds interesting. Maybe make the players all imperial by default, with two basic jobs: hauling supplies and guarding the supply lines. And some of the players (nobody knows who) are rebel infiltrators.
It all takes place in space, on a limited number of space lanes. The map would be nodes linked by jump lines, with planets and space stations at some of these lines.
Imperial haulers must bring the supplies wherever the imperial command need them
Imperial guards must ensure that the supplies get to their destination.
Rebel haulers must bring the supplies they were entrusted with to the rebellion, without being caught by the guards.
Rebel guards must help the rebel haulers not to get caught (vouching for them for example), and can, in a good day, raid the imperial haulers.
Guards could have two types of action: physically protecting the haulers with TIEs, or monitoring their travel. TIEs cannot hyperjump, so they can only guard the between-jumps space. Which, by the way, is also the only place they can be raided. Guarding counter rebel guards, but rebel haulers can freely jump without the imperial knowing where they go. Monitoring counter rebel haulers as they would be identified if they go to the rebellion (the rendez-vous point change regularly), but leave haulers unprotected against rebel raiders.
It would need a lot of polishing to make it playable, let alone enjoyable, but I see potential.