Seems to me the reason they're hiring civilians is so the functional can't deploy them, PCS them to staff, send them to a school, lose them to an MWS...
Your approach has merit, but in the end, it's only as stable as the support from the top. By the time they graduated UPT, the next CSAF could decide they have different priorities and now these folks who signed up to be FAIPs are heading to B-52s and C-130s, and UPT continues to be undermanned.
One wonders if there was this level of consternation when they first hired civilian academic and sim instructors...