The purpose of dropping these guys from the P-3 pipeline goes along with the reduction of Fleet Maritime assets that is in the works. I've heard everything from 30 pilots, total, in every squadron, to pulling one active squadron from every site, and shifting from a deployment rotation to dets.
There's still gonna be aircrews, and they'll still need PPCs. Math-wise (as I abuse the English language), every reporting 3P has to eventually qualify as a PPC to keep continuity and crews tactically ready as per stan notes (crews are organized and kept together for the most part for proficiency). By pulling some bodies, they keep a glut of pilots out of the system and later, out of a position of "too many pilots, too few seats".
My guess is, the intention is to have one pilot for every position in the squadron at all times (which is not always the case right now), no more, no less. The guys who end up staying in Maritime advanced now, once winged, won't get as many hours as guys in the past, true, but they will still be flying.
Getting an IP or other flying billet isn't impossible, most 2nd tour billets are flying jobs, whether its the FRS, VTs, VX, station pilot, or whatever else is out there. Yes, people do get jammed with a non flying billet occasionally (I almost did), fact of life. But it isn't like you can count on not flying after your first tour. Bottom line, this seems to be a solution to the issue of too many single-anchor types in a VP squadron in years to come. The alternative offered isn't great, but it's better than managing a TGIFriday's or Chotchsky's.