This is a much better system overall than the old AW system (all positions could be manned but you couldn't gun your own buff). 2 drone buddies tagging along for extra firepower, all guns from all planes that have a shot fire together, fewer people wasting their time and you can gun your own plane.
The only downfall to this system is being tag teamed by one or more fighters. You can only track one at a time, so, if there were an enhancement to be made it might be to allow the pilot and his gunner to both man gun positions. In doing so I would envision that the drone guns in the same positions would remain slaved to each gunner while all other guns drop out of service. Alternately, all guns but those manned could drop out forcing more plane to plane jumps for the gunners. Jumping positions would not be affectted by lag any worse than was the case in AW (no noticable effect). As soon as your back to one gunner then it's back to current mode.
This would allow you to deal with multiple attackers more effectively while at the same time reducing firepower somewhat to compensate and not re-introduce the death star scenario (although flying a fully manned B-17 through a furball in AW used to be sort of fun).