So the basic crux of the situation is that us HGV members (pre grandfather phase) continue (so far) to book HGV like usual.
If we want DRI resorts, we'll either have to buy DRI, Purchase Max, or possibly if the resort is in RCI, book it that way.
It seems it doesn't (IMO) make sense to spend $7k for DRI access and I'd be better off using RCI (if possible) or buying resale DRI?
Although I know I tried to put an OGS in for Cabo Azul in RCI (last year, maybe?) and the system wouldn't let me. Called and the rep tried doing it as well and it wouldn't let her. She dug into it and said the resort wasn't "in" the RCI system or something similar (I know it's in Interval) so I wonder if that was something to do with DRI/HGV merger? Dunno. But she thought it was weird that the resort was in the list, but unable to be booked/OGS'd.
BUT that was a while ago (that's one of the few DRI resorts I'd be interested in)
I've never been able to book via Interval for that resort, either. (shows up in the list, but never get a match with my trades)