I must be flying a different game. I've been flying what I thought was AH since it started and I've never seen AI puffy ack hit anything whatsoever (except my own puffy ack killed me once when I was trying to defend the CV from an attacker). I have been on CVs hundreds of times where slow level bombers were fired at by the AI puffy ack, but I cannot recall a single time they ever hit them. Manned puffy ack yes, unmanned never. Unless a CV is manned, it has a 0% probability of surviving incoming bombers and the bombers, if above normal ack range, have nearly a 100% chance of exiting untouched.
So yes, go ahead and remove puffy ack- it does nothing whatsoever (except confuse the manned gunners regarding their aim).
I do agree that firing through mountains is not right, but that would be a complicated fix as the host apparently doesn't actually trace the puffy ack flight path so it can't know it's firing through mountains.