I agree that the Imperial Shuttle is a nice choice, but it would have to be more competitive than that awful rendition in the Starship Battles game. Granted, they aren't combat craft, but they're big enough that they ought to be able to hold their own against a couple starfighters. The other concern is game balance. Budgernaut and I have racked our brains but we could not come up with an appropriate counterpart to the Imperial Shuttle on the Rebel side. Unless, perhaps, it came with a Rebel card entitled "Stolen Imperial Shuttle Tydirium." …Has this already been mentioned here on the forums? Oh well.
Game balance is called a built in point system where it's easy total up a few starfighters on the Rebel side to equal the point value of the single Imperial Shuttle.