Buffs are more or less worthless now. The reduced accuracy, and inability to turn without taking 10miles to line up make killing more than two airfield targets in one pass difficult, even with a perfect calibration. The bomber formation damage model makes entire formations about as durable as a 1.09 lone buff, except a much bigger target. Also, considering above 140000feet, you need to deal with wind, flying above fighters is no longer practical.
Lets compare this to your average jabo,
Jabo runs are fairly quick, can kill a hangar with precision. Smaller targets can be dealt with using guns, and can dogfight afterwards.
Bomber runs take quite a bit longer, but can potentially kill two or three major targets(i.e. hangars) With a bad calibration, you'll hit nothing. When you're done, you can either auger, or fly home.
What about strat bombing?
Kill a little bit of fuel, so a fields fuel takes 15minutes longer to come up! Or, make the hangars take 5 more minutes. Judging by the repair times of fields in enemy zones, which shouldnt get the benefit of any strat, there is no real effect on the game over the amount of time that you can extend fields being damaged. Then again, combine that with the fact that buffs cant hurt fields significantly, and fighter attacks tend to de-ack and vulch, rather than hitting the field, and it becomes almost entirely pointless.
Bombers? Bah. Load 2000lbs of bombs and some rockets onto a fighter.