Ok to summarize everyone's points against buying Poly1 one now are:
-Wait for the better room selection (I completely agree with that if that is a concern for your family)
-Poly2 will drive down the price of Poly1 (That is a possibility if Poly2 becomes its own association, but if it is added to the old it could drive up the price a little)
-Wait so you can get Membership benefits (This is the argument against buying all DVC resale, so if resale makes sense for you now it will make sense once Poly2 launches)
-"Booking Restrictions" (Once again this is one of the arguments against buying resale for all resorts)
So to me it seems like the two main issues are room selection and possible price drop. If you love Poly1 and the rooms, great. If you dont mind playing a stock market type game with the what ifs and pricing, great.
Sound about right?
PS... waiting on ROFR is a pain haha