Remember that the bomber class is actually divided into two subclasses: light (catamaran, etc.) and heavy (thor, etc.).
The BHG bomber is one of those light bombers in terms of speed and small hitbox, which is why it feels superior to VHFs. But the kicker is: whenever a VHF jousts a bomber the VHF is at a disadvantage, because of the bombers brute force (superior armour, weaponry).
What I see as a fair balance point: bombers should NOT be able to outturn a fighter, otherwise they can get a fighter in their screen far more easier and fire that instakill torp+SN. A VHF should be able to stay on a bombers tail indefinitely, and pummel it with guns rather than be forced to joust it all the time where it is easily killed by a bomber who knows what he is doing. If bombers get a turn rate increase, this will only help them in anti fighter duties while a strafe decrease will worsen them against capships.
Bombers are fine as they are, although the light bombers could use some nerfs while the heavies (especially the Thor and Barghest) could use some hard strafing and powerplant buffs.