I know, I know, I know.... "not another one". But I ran into something this morning that sounds like a viable solution that would add something new to the game. Found this on Wookieepedia when reading through the different versions of the Tie-Advanced:
This ship had a laser cannon turret on the top-back of the craft used to defend the craft from pursuers. With a good gunner, the rear turret could be very accurate and hard to evade, which made attacks from the rear or above very difficult even with all shield power channeled forward. Many TIE Aggressor pilots were trained to skirt the outer edges of a combat zone, letting their gunner take shots at any enemy fighters that were currently engaging Imperial craft. If any enemy fighters attempted to pursue the Aggressor, the pilot would fly away from the combat zone, exposing the pursuing craft to the rear turret, while the Aggressor's wingmate would fall in behind the Rebel fighter. The ship represented a distinct break in typical Imperial Starfighter design philosophy, placing survivability and performance over cost efficiency and ease of maintenance.
This would be The Aggressor modification and would add a back facing firing arc to the Advanced. This would also mean that FFG would have to print new base cards (or something that fit over top of them), but I think it could be a cool fix. Imagine 4 little Firesprays running around the board!

