The best answers we now have:
1) Not just until D14 lights up, but for long, long, term - PR will be a part of Directv 'Domestic'
2) All the Beam PR resources on GLA will not be relinquished, but rather pressed into service to supplement the demand for Latin America services. Perhaps a new beam?
3) Current press releases talk about coming 'new technology'. The new technology in the background looks amazingly like a Slimline 3....
I can't recall for sure, but I thought one of the specs on d14 and d15 was that they would have some transponders to PR as well. I wonder if that's for additional, or backup, or that plans have changed.