I don't really see it as feasible to switch A/C while under attack. Your in tail gun plane 1, your firing, the bandits firing, you take some hits. Switching planes will disrupt your fire, giving the bandit more time to kill you. Plus, in the time it takes to switch gun spots, he's moved, still firing, you've stopped firing, and now have to reacquire your firing solution. You might as well just give him whatever plane he's aiming at, and start from another one. So every bandit gets a free kill! Woohooo!!!!. Let's hope you don't get jumped by more than 2 before target.
In my mind, you stay in the plane your in, until it's dead. It's not our fault the moronic drones follow the lead flight into a death roll. It's the code. The drones should stay straight and level.