Two... Hmm...
HAHAHHAHAHAAHHAHAH! Bombers are fine. You merely want their guns to be better so its easier to target fighters.
#2 Capship buff (coming, larger # of turrets, if Mjolnir keeps his promises, heavy BS solaris which makes me Q_Q_Q_Q_Q_Q_Q_Q)
#3...
Greater variety. In everything in general. Ships, systems, what have you.
the bomba ballance issue is kinda 2-dimensional, cause its not only about making them worse against one type of ship, there is two types, fighters and caps, that they need to be closely ballanced against.
I'd make them better against fighters, but not in all aspects.
Make bombers easier to hit for fighters, so fighters can actualyl do something against them before they kill a cap.
Make bomber normal guns a bit faster, so they arent totally useless agaisnt fighters.
Make snac less suitable for instaklling fighters. Maybe give it the same damage as minirazor, but higher refire rate. like two shots per joust possible, although same speed as snac.
Then ballance the refire rate of the nerfed snac so it gets the damage output per minute that you want on caps.
Main problem with bombers is that they always lose against a fighter if the fighter knows how to dodge a snac, Its just a yes/no kind of fight, skill doesnt change the outcome.