"Buying great professors" - I doubt this will make much difference. Every school claims this, and there are a lot of talented people out there.
I understand what you mean. Lots of schools are trying to keep up with the top schools in recruiting scholarly talent. The only reason I actually believe it in the case of Pitt is that they've actually attracted several established, tenured professors (through very generous salary packages) from places like Yale, Stanford, and NYU, among others. I apologize for not being able to provide a link to this information (I did a search and couldn't find it); I can only say that I am being completely honest when I report that this information has a source.
But yeah, Pittsburgh is seriously one of the most underrated cities. It is nothing like the boring old steel town that people who haven't been view it as. If there is a complaint with which I can sympathize, it is that the winters are long and harsh, but no worse than Chicago (and not as harsh as Boston, though Boston in general gets more sunshine throughout the year).
I also think USD will rise, as USD is recruiting TONS of the best professors. Everyone wants to retire in the that region, it seems. Plus, students with stellar creds are applying because of the reported scholarship opportunities. Many of these students will be lured into SD, so their numbers will increase substantially (as they have in recent years).
Wups, this thread is for schools that will fall. Hmmph. Hastings, perhaps? That is purely a whimsical guess, though.