Bombers are absolutely useless against a good capfleet now, even one without fighter support. Repair ships, bot sharing and cloacks = no way you will do anything in bomber before untimely death due to stupid mistake.
Bombers can really be used nicely against caps, but you need numbers and cautious teamwork. 4 light bombers can take down almost anything with just snacs, as long as they are not covered by fighters. From my experience, that is.
I am guessing it's not proper to go against a fleet of 10 caps with 4-5 bombers, you need numbers.