I'm going to wait it out until I see what the conversion ratio turns out being before I burn all my 65k SPG points. If I don't like it I'll probably just do a nights and flights package to burn them quick and dirty...Or if I'm under 60k by then, just transfer them to AA.
I've never been a part of Marriott's program and rarely stay with them so I'm not really optimistic about the fate of my SPG rewards, but I'm keeping the card until the bitter end. Speculation can get the best of us sometimes...