My only problem with Bomber Starships is they keep getting themselves killed when they have nothing to attack. If I could fix them, I'd make them "Shy":
When set on Attack-Move with a group of other ship types, they act like they are group-moved with the next fastest ship type you have selected
You could still get them to charge ahead by either Attack-Moving them as a separate group or directly targeting an enemy. So if you click a Guard Post, they go all out, racing ahead of your fleet. If you Attack-Move a Guard Post, they'll be at the front, but won't suicide ahead.