I think Ubergeek's main idea is right : no changes are required to bombers (except to the Corsair because of the possible abuse reported by Lu Xun, and the Seraphim torpedo bomber because its weapon is nullified by anti-torp weapons whereas all other torp bombers have their weapon immune to anti-torp weapons).
Bombers are alright. It's better to slighlty buff t1 mobile AA, which would also help a little against t2 air being a little bit on the too strong side. With 20 DPS instead of 15-16 and 60 muzzle velocity instead of 45 (30 instead of 15 for cybran tracking weapon), less shots will miss, and less t1 mobile AA will be required to counter early bombers and early t2 gunships.
As for carpet bombing, it would be great, but i guess it's difficult to modify.