I like yours tortured soul, and might I make an addition..
Bomber -
Armor: Low
Shielding: Low
Powerplant: Very High
Hardpoints: Low / High
Deployment: Very Slow
Speed: Medium-Fast
Maneuverability: Medium-Fast
Nanobots: Low
Shield Batteries: Low
Silhouette: Low-Medium
Range: Short
Bomber should have two class 4 turrets with 360 rotation, but more powerful, yet slower torpedoes. A Top Teir Vessel without Fighter, or better yet, Gunboat support, wouldn't stand a chance. But it has to be virtually ineffective against fighters and gunboats.
Right now Bombers are so slow I have no problem picking them off with a Battleship's turrets.
I agree with TS that cap ships should be forced into fleet combat, that a BS without at least one of the following, cruiser, gunboat, or fighter support, should be pretty hopeless.
And if you wanted to fill out the classes just a bit more, a long range torpedo boat, like a gunboat, but with maybe one turret, that has extremely long range unguided torps. Make them relitively slow moving so that if the BS does spot them, the fighters can blow them out of space. Adding almost a submarine type feel to the game.
You could even completely revamp the Gunboat class, and give it's abilities to cruisers, and just give it one anti-fighter turret, one gunboat forward gun, and two or four VERY slow reloading LONG range torp slots. Literally make it into a space submarine.