Welll...should Cobia have a load out of only .303s to start with, and perk the .50s for him? Last thing he needs is some 20mike mikes.
Just say'n...
Boo
No. He should use the historically significant version and if he wants to misuse it, flying it far, far outside of its allowed flight envelope, as a fighter that is his prerogative.
If the quad 20mm option were added in an uncontrolled manner the quad .50 A-20G would become all but extinct in the game, despite the fact that 90% of A-20Gs were armed with only .50s.