As far as heavy bombs, I think it’s an interesting idea. Regarding what ship, personally I think it should go on more underused hulls rather than on some of the high use hulls types (stealth bombers or T3Cs).
I do like the idea of having to commit a bigger ship to kill capitals in this way, it’s shouldn’t be low risk, low commitment to use a heavy bomb.
That’s just my opinion to spread out ship usage more, who know what the idea will eventually turn into.