Just perk 500 and 1000lb bombs for jabos.
+2 perks for each 500lb bombs and +5 for each 1000. +10 for 2000lb bombs(*cough*p38*cough*) Lose em if you die. This would not only help reduce suicides, but also encourage people to use the lightest possible load, adding to realism. Rather than the usual maxed bombload.
Add a dive angle restriction to level bombers.
Reduce the total ordnance needed to damage all hangars.(except for HQ) Mainly hangars, 1500 for an airfield hangar and 500 for a VH hangar. (Maybe 500 for ANY VH, and 1500 for FH/BH's)
Perking bombs, and eliminating divebombing effectivness for bombers will make things somewhat more realistic, but without reduced hardness settings, will only serve to encourage more furballing, and less attempting to take a base. Perking the heavy bombs, will severely restrict ordnance carrying, which is often already unavailable(due to people furballing, and never carrying ord). Reducing the hardness will make the perk bombs more effective, while penalizing suicide bombing.
It will also encourage bomber use, and use of the level bombsight, since the damage capability of the bombers will severely outweigh that of the free jabos.