I wonder what the actual percentages are for each puffy ack series of bursts to hit your airplane? The way it is coded with the 'box', you'd probably have to do a test with a high number of trials to figure out what the actual percentage chance of a fighter getting hit is. I'd say from experience, slightly biased, it is probably between a 15-20% chance to get blasted on any 2 second burst.
Say every 5 seconds, you have a 15-20% chance to get damaged. If you're in the ack for 30 seconds, you have to avoid ~6 bursts of puffy ack that each have a 15-20% of hitting you. My probability skills are a little rusty, but from my calculations, you'll be damaged ~62%-74% of the time based on the 15%min & 20%max guesstimates.
As for bomber formations, the puffy ack does nothing to deter a successful pass on the carrier. For one, bombers are very durable. They can usually take a number of puffy ack blasts before going down or being damaged in any crippling way. For two, you have 3 durable bombers to work with. The puffy ack stands no chance in stopping the actual threat on the carrier.
So the real question is, what is the puffy ack intended to do for gameplay? What is its purpose? From the information at hand, the only real answer of what it DOES do, is keep the defenders under 3k. If you go above 3k for >30 seconds you have at least a 60% chance of getting seriously damaged. The only option for a defender is to stay below 3k. The attackers have the ability to climb to 6-7k and pick at their leisure with no recourse from the defenders. The only viable solution for the defenders is to destroy the carrier via suicide B25H, 110 attacks, and up bombers from bases afar. You have to destroy the carrier because the fight is so lop sided. It's a complete burden to fight with a carrier nearby. Not to mention a good gunning 5 incher who will blast anyone out of the sky getting anywhere considered close to the task group.
HiTech, is this what you intend to be happening between carrier/land fights?