JTO & Guest 22 - the aspect of PAS is that it is a defined pay spine and not an engagement structure, hence why it wasn't included in the revised engagement structures slides. As aircrew you should expect to be employed in accordance with the Flying Branch slides. So Flt Lt after OCU to EDP, promotion to Wg Cdr to 60.
I think you are wide of the mark as your paragraph effectively deletes PAS by saying flt lts serve to EDP only wg cdrs make it to 60 - it makes no sense.
PAS is an engagement structure that is squarely aimed at achieving an enhanced pension by trading SP Flying for an enhanced rate of basic pay. In addition, you have to be beyond your IPP/EDP to start on the scheme.
Anyway, others on the forum have commented that PAS did make it to the revised engagement slides on the later briefs.