Historically, what was used in the anti-shipping role, against the larger ships? The B25s, Mossie with the big gun (Tse tse?), and ordnance from attack planes of all sorts, divebombers, etc? Is AH even capable of determining what does the actual damage, or is it just looking for X amount of damage points, whether coming from 30cals or 4K eggs? I guess it does for tanks, but doesn't seem to for anything else.
For gameplay purposes, I don't see anything that makes the tactic less effective, without adding more artificial limitations, than simply doing away with formations. We don't have the things that formations were added to offset, and most formations are not used as bombers, but jabos and suicide bombers. Those who really enjoy bombers, and the challenge of setting up good runs at alt, planning long flights, organizing escorts and what not will continue to do things the hard way, just like they did before we had formations.
As long as fighters can strafe down armored gun turrets with machineguns, and bombers can single-handedly wipe out the 2 main ships, and it's retarded easy, that's what is going to happen most of the time.
<edit> With regards to the limit-to-F6 mode, a simple macro negates that. O, X, F6, B. Doors open, autopilot engages, switch to bombardier's position, autopilot engaged, bombs away. Although HTC did change things so you could no longer calibrate from the pilot's seat for laser accuracy, this change would not have any significant effect on the suicide bombers, since autopilot no longer causes a violent change to level flight.