Have to say i love the idea of an AI gunner with a realistic level of accuracy.
It would allow planes such as the 410, 110, stukas, tbm, BSD (insert many many more here) to actually have some chance at survival. Especially since currently non formation planes ( attackers like the 410 and il2) have that extra weight yet are virtually dead if the pilot jumps into the gun position. Adding AI would make these much more realistic targets, even if they only could cause minor damage, simply because now a pilot can attempt to maneuver away from potential attacks and still Harv a chance to score a kill with a very lucky ping. Survivability in non formation attack planes is very low because usually the options are incredibly limited on the defensive, usually coming down to "Can i avoid his guns long enough that a friendly might happen to come help, or he runs outta ammo.
Might even pull some planes away from the hangar queen stigma if pilots felt slightly more assured that they could stand a chance given a ftr interception