[Ragnarok-X]

It just makes sense. Starfuries arent meant to bombard capitalships, thats work for the Thunderbolts. The Minbari have different classes of fighters as well, with the Nial being the superior fighter. There is the Tishat as well, which is some kind of precessor of the Nial. They have some kind of bomber as well, i just dont remember its name. I think the narn have the Frazi and something which is called Gorith or something.
In addition, its not necesarry to go canon all the way. Lastly, there is one major B5 mod, for a game called Armada 2. The mod took several years to complete, and they have included different "kinds" of fighters as well. I dont see a reason why our mod should include that feature as well. Look at modern fighters, we have specialized fighters and bombers as well.