This is what I was thinking. The initial drawings are just that...initial. What if the new pool has an infinity portion, but also has a waterfall or other area that appeals to kids? That would really help. It can't just be an infinity pool if those guests have access to the Volcano pool. That new pool would need a draw for kids/families.
I still think they could restrict Poly2 guests from accessing the Volcano pool. I understand Sandisw's points as to why those guests would be able to access the Volcano pool, and they are really good ones. But Disney/
DVC can do anything they want. If Poly2 was it's own association, Disney could restrict those guests from accessing the Volcano pool if they wanted to. Poly2 is a DVC resort that has already been marketed as having it's own restaurants and amenities, so all DVC has to do is communicate to owners before purchasing that they will only have access to that Poly2 pool. Buyers would know that going into it. There is nothing that I am aware of that states DVC would have to allow owners at one association have access to pools at another association. Every situation within DVC seems to be somewhat unique. CCV/BRV, VGF, etc had their rules established for accessing amenities when they were developed...and in those situations it made sense to share pools. Would it have shocked anyone if they built a new pool at WL and CCV/BRV couldn't access each others pools? Disney could have done that if they wanted, but they didn't because it made sense based on demand to just have both associations access the same pools.
It will be interesting to see what happens. I honestly can see both sides of the discussion and think it could go either way. I just caution against stating that DVC "can't do" something like restricting access across associations. Because they absolutely can. And we have all seen DVC has no problem changing things up as they open new associations.