I've mentioned this on the FAFPS thread, but following a chat with the folks at the FAFPS the key to the whole future of PAS lies within changes to the pay scheme which we have, so far, heard nothing about.
The idea of the pension is to give one scheme for all, reflecting average earnings; for PA, we now need to know how the pay will change and how those average earnings will pan out to make PA as appealing as it it once was.
All of this detail is unknown so far and makes the decision for anyone to take PA at the moment, IMHO, impossible.