I think that this old chestnut of a problem is due to a few factors:
1) Fear that the lolwutters in their capships will wreak chaos on everyone's roleplay. The bombers are considered to be one of the best de facto counters to poor rp. See a lolwutter - take him out with 3 bombers. All done. If we "nerf" the bombers, we lose our roleplay police.
2) Many dedicated bomber pilots know they have a good thing going and are not going to buy into any idea of making their primary ship more specialized.
3) Scornstar's axiom (his observation, not his personal opinion): Smaller ship = greater rp value; Larger ship = lesser rp value. This attitude is alive and well on this server. Inevitably, some 14-year old will question your rp and pvp skills in system chat, because you happen to be in a capship - "Wut a noob! needs a BS to fite 4 bomburs!", all the while lobbing SNACs at your ship. A ship that happens to be 100 times larger than his. It seems to me that bomber pilot in this case (not all bomber pilots are like this) puts more value in pvp-skills than in rp-skills.
This is a symptom of a larger problem: lack of respect for one another as players. In reality, good rp quality is not determined by the ship class, but by how the ship is used in different situations. I've seen engaging rp from miners and craptacular rp from fighters.
Those of us who primarily fly capships got a mixed bag with the new mod. Some things were improved, other things got nerfed three ways to Sunday. As a result, capships lost a lot of flexibility in order to balance out overall gameplay. In line with much of what Eternal had to say on the matter, I think it's perfectly reasonable to ask bomber pilots for some sacrifices. Bombers should be primarily bombers - capship killers. Fighters should be efficient at killing bombers. And bombers would actually need escorts to keep enemy fighters off of them.