The whole AI gunning scheme needs rework, IMHO.
Not just puffy Ack, actually all field/ship guns.
The current logic is blatant simple from what I experienced in the year since I play AH.
And the initial post proves the simplicity esp. for puffy Ack.
The field guns for example are so damn predictive, and like ship's close-range defensive armament, often focus a single target though there are plenty of targets within range. No wonder carriers get sunk so easily...
And what's missing too are automatic gunners for bombers.
The current setting to instantly fire almost all the guns of the three B-17/24's in a formation at one focal point isn't that realistic.
The game could be so much better with just a little more code reworked and some extra or smarter logic added here and there.
Not just in AI. Other parts like weather (clouds, haze, dusk), terrain (water, vegetation) and its generation etc, too.
Lots of room for improvement actually... Wished HTC would open the code (under the terms of a NDA or such) to external devs to fix such issues or enhance the game a bit...
But then, I haven't asked yet...

Cheers,
Vasco