Puffy ack is okay as it is. I think it's tough but there have been times I've flown through an alley of ack and not taken a single ping for 100 miles.
However, what I'd really like to see implemented is MUCH stronger AAA!!!!
Like was said, a single plane in a single pass can take out half the guns on a field, and it almost never takes any damage. Hell I as in a weak japanese plane over an enemy field and I took about 7-9 AAA pings at different times before anything fell off (and what finally fell off was my radiator).
That's absurd. I was low level, low speed, less than 200 feet over an enemy field, and I was there for 3-5 minutes (dogfight with enemy plane). Then when I do finally get hits, waiting for my teammates to show up, they do nothing.
I propose that there are MANY more ack guns per field. And I propose this is done by clustering ack. So in the same location, where we now have 1 AAA gun, I suggest there be 3 smaller nests. All shoot at the same target, so AI stays the same. Only all three fire. This makes 3x the rounds being shot at a plane (tougher), it makes strafing any one position dangerous (as all 3 positions will be shooting at the strafer) and would make small bombs much more useful for taking out entire clusters (forcing people to actually carry ord once in a while).
So basically this tripples the number of rounds being shot at low level planes, it tripples the task of any strafer, and it tripples the threat any single AAA battery is to a strafer as the strafer aims at that battery.
I might suggest faster firing for each AAA as well, but this is a good start.