I like that it will give us more options as members, and having another resort on the monorail line is good for all.
However, I doubt if we would add-on at that resort. We own at SSR, and I don't know if we have any plans to ever add-on, but if we did, my mindset would be to get a small contract (25-50) with the same use year at our current resort. That could change, but I wont put much effort into thinking about it unless we decide to add.
We are at a crossroads with our membership (not in a bad way, as we love DVC). We have always taken our DD9 out of school and taken our trips during off peak times. That may not be possible much longer, so we have to see how our vacation patterns change.
I do love the area and theme of the Poly, and I think it is a great addition to the DVC resorts. We got to see the VGF last week, we went to the open house on Tuesday prior to them opening. Beautiful resort. But for me - although I love staying at different locations, we don't have a huge DVC contract, so if I get more value out of staying at AKV, OKW and SSR, so be it.