otto just might have a use. Dinnae how feasible it is though. If the pilot is heads down in the sight, and there is no human gunner aboard, otto kicks in. I think this would reduce the tendency to use a fort as a "deathstar" because it's awfully hard to chase an airtarget when you're looking down =). It also provides cover for the buff driver over his target if he dinnae have a live, human gunner.
As for gunners joining after takeoff, I dinnae really like the idea. As for the long, boring climb and flight to the target area, the gunners of a formation of 17s could discuss how they want to share the firing arcs around the formation.
Last night I and 2 others flew a 3-ship formation run deep into enemy territory. I thought it was fun keeping all of us together, and once we were over the mountains, we pretty much stayed within a 1k radius in a triangular-type formation. With gunners, this would be a death trap for fighters =)