They owe it to shareholders to raise the price by what they believe the economy will support. In the old days, I believe they raised prices as little as $1.25 per point.
If China does not bring down the US economy, I suspect there will be two more increases before spring 2017.
I wouldn't be surprised if they raised it again when they finally finish the East pool (spring or summer 2016). Right now, they have been selling a resort that is no where near as complete as Kidani, BLT, VGC, or VGF were when they opened (or during their first 12-14 months of operation).
I also suspect another price increase after "Moana" comes out in 2016. A Disney movie with the central character being a Polynesian princess is great advertising for both PVB and Aulani.