Not a bad idea, but it would require some balancing with the current ordnance.
In AH all bombs are multi-purpose, and many planes use load outs of 2x 1000lbs bombs, which were not that common in reality. As a result, gather 3~4 suicidal pilots and toss them into the town/field/objective, and then even without particular mastery or skill of bombing they'll wipe out their target with ease. Since the F4U-1C came to be perked, the new "multi-purpose jabo" plane has shifted to the Typhoon with quad hispanos and 2k load out, the fastest sea-level, non-perked fighter in AH. You'll see heaps of Typhie scourge every so often wiping out towns and strats in mere seconds.
Maybe if the ordnance is more diversified according to specific purpose, and the super-duper 1k bomb becomes more rare...