That would be nice, but given that PP is an "unpublished" level and that the requirements vary from year to year, that makes it unlikely Marriott will do so. Marriott insiders have mentioned that only the top 3% of Plats gets PP. So they have given us a type of qualification. Of course the question of top 3% in what way isn't really addressed.

Personally, I think the suggestion of an increased welcome amenity is a good one and wouldn't really be too costly or hard to implement. Another option would be to do what some of the airlines do with their top elites. As an EXP for AA, if I can't find Standard award availability online, I can call the EXP desk and they can quite often open some extra availability up for me. Marriott could do the same by opening up some extra standard award availability. (Given that there should be very few PPs, this also shouldn't be a huge expense.)

Also, is the PP Service desk open 24 hrs/day? That is one of my pet peeves with Marriott. If I'm checking in late at night and there is an "issue" lilke sophiegirl's Desk could not process Premium Pound, Gift Cheque, OR Gift Certificates thread, then as a PP, just call up the PP Desk and let them deal with the problem for you. I do believe that SPG has something like this for all their Plats.