I like the "launcher" idea a lot, which makes me kind of sad we didn't see a "Trajectory Simulator"-like bomb launch in the movie. I like the opening scene, but seriously, you coud have a g*dd*mn Space Trebuchet moment laid out for you!
In this case, I advocate a third group: The resistance only uses Ordnance Silos on their Bombers, thus flying a very boring version of what is possible on the frame.