The email from the deskenfuhrer this afternoon confirmed that if you're already on PAS then you remain on the original terms. The level 30 cap applies to those who accept a PAS offer after 1 Apr 10.
That's a shame. The whole idea of the change was to stop the Flt Lt Pilot who does nothing but turn up to fly or sim, but Sweet FA else, getting a bigger pension than all the Sqn Ldrs (except a PAS Pilot) and generally speaking probably the Boss.