Do note that you're sending fighters at an anti-fighter ship. That's not exactly a good idea, isn't it? That being said, without the flak burst, groups of 12 or more anti-fighter frigates are no threat to massed bombers, even though they should be. The flak burst is made so that you can't simply spam bombers and send them at Lancers and kill them easily. Do remember how canon wise dedicated anti-fighter frigates, were akin to a hot knife slicing through butter when it came to starfighters. This was seen during the Thrawn campaign with Imperial hit-and-run tactics, where Lancers slaughtered the NR's starfighter defenses, and the Second Battle of Helska of the Vong war, where two Ranger gunships held off hundreds of coralskippers. Of course, the alternative to this is to give anti-fighter frigates a new damage type, with an absurd damage bonus to VERYLIGHT (aka. fighter) armor, and lowering the capabilities of flak burst. Though I'm somewhat hesitant to do this as fighters can get a massive health bonus from research, between hull and armor research, this is effectively over 60%. As it is now, flak bursts are balanced out to represent total destruction of X fighters, versus killing all fighters with It hasn't been disabled or changed at all. Perhaps less visible it's due to the skybox illuminating the ISD?