Interesting idea
Current arena setup does not allow for limiting ords by type, weight, or anything else. Either you have all of them, or you have none. (Hopes this gets changed soon)
Except for some very late war sorties most fighters simply could not load up a pair of 1k bombs, rocks and takeoff.
They just were not that easy to get. Early war 250 lbs and mid - late war I agree, fighters should be limited to 500's.
But the AH coad would have to be extensively changed IMO to make this possible.
The same problem happens with plane choices, and to change that again takes a total rework of the coad.
Maps would have to be rebuilt and redesigned to work with the new system.
Part of the problem is that certain groups of people in AH have pretty much chased all the bomber pilots out of the game. Compounded by the fact that AH really doesn't reward you for taking the time to do a bombing sortie correctly.
A few perk points that can only be spent on a jet bomber, and thats about it. No "name in lights" for bombing, only for shooting down attackers. Thats the first thing thats going to have to change.