As far as combat use Cats were really intended for ASW. I know there was one occasion in the Guadalcanal campaign where a Cat was used to torpedo a surface warship in daylight, but that was a rare if not unique occurrence - it's way too big and slow to be survivable against warship ack in daylight. It was used to attack transports, mostly at night, but its main use overall was for scouting due to its extremely long legs, but that's not much of an advantage in the MA. Still, I would like to see it in the game since it played such an important role in the war.
I think the best use of the PBY in this game would be to allow it to spawn at ports - that would give it a realistic capability that's currently lacking in the game.
I can't see much use for Black Cats since we don't have a real night in the game.
