The biggest problems facing buffs are bugs, and the lack of viable targets to bomb.
First and formost, Strat targets except cities are better suited to precision bombing then carpet bombing.
Bugs affecting buffs,
1. Various formation bugs, bombers taking off backwards, inability for ar234 drones to take off with ratos. drones falling behind and exploding while flying straight and level.
2. Strat bugs,
On the small maps, bombing strat only does a max of 33% damage. Kill all of one countries strat, and theyll only drop to 66%. Throw in the fact that even without this, strat has no effect that you'd notice without watching it, and strat is worthless.
3. Damage bugs.
Sometimes all of the buffs take the same damage. Anyone who's flown a lot of buffs, or killed a lot, knows what I'm talking about. You blast the wing off one, the pilot bails, and the wing vanishes from the drone he is now in. Same thign on buff #3, sending all down at once. Or one of your buffs gets shot down, and you end up flying an apparently undamaged plane that seems to be invisibly leaking oil untill the engine dies.