I'm not sure that Aulani moved the needle much for DVC. Yes, it's a beautiful property which many owners enjoy visiting. But it's also been selling for 16 years with no immediate end in sight.
Some insiders I've spoken with suggest that the decision to build Aulani had too much emotion attached to it and not enough sound business analysis. There was an issue with early dues calculation, which suggests greater budgeting / operating costs estimates were flawed. When you factor in the land acquisition costs and more than a decade of sales and marketing, it has to be the least profitable DVC resort ever. Over the same timeframe, they've sold about 3x as many points in WDW-based resorts, many at a higher price.
In more recent years, DVC has used trading companies like RCI to promote non-Disney options. If a prospect has concerns about only using points at the theme park resorts, they can flash a list of literally hundreds of destinations available for trade. (Without having to go into specifics about ease of trading or quality of location.) I don't think there are many people who could accurately claim "I wouldn't buy DVC if Aulani didn't exist, but I will buy because it does exist."