[Blasph-Mossquitty]

EXACTLY! Plus, I think the AntiAircraft guns are hard to get past. In the Chichi Jima campaign, the AAA is so damn thick that you can barely survive it no matter what you're flying. Plus, on every other mission, your carrier gets attacked by some thirty Zeros, and defending the fleet with just 6 Seafires. I was so pissed at Maddox games for a while.
When escorting TBMs on Palau, one little fighter distracts you from escorting the bombers halfway to the target, and the TBMs get turned into flying sushi for the Japs.
A campaign is worth playing as long as it's beatable.