I imagine that an FRI would have tempted a few pilots to stay on, lets face it, there won't be any one incentive that would appeal to everybody.
The AFPRB report suprised me too. I think the smoke and mirrors worked, DAAvn convinced everyone that the Corps is fully manned. The figures you quote are only half the story, QHI's are another. One of the two Attack Regiments only has two QHI's and it should have had eight, can't man that one so we cut the establishment, so now it's only five!
One of the two Attack Regiments doesn't have a Weapons officer, and why would they need one! The other one is about to be posted. No manning problems here though.
HEDP, the coffee smells good from my office!