A DVC's owner's timeshare interest neither guarantees an owner a particular unit for a particular week of the year. Nor does it obligate them to take a particular unit in a particular week of the year every year.
Most view this flexibility as a plus and I think that many timeshare companies have moved to this model because owners find it very convenient.
Also note that with VGF and PVB (and Aulani), prospective buyers have the option of purchasing a guaranteed week in a particular room size/type. They can also cancel their guaranteed week and have the points back to use like a "normal" owner as well. It does "cost" an extra 10% in points for a guaranteed week.
I wouldn't say that DVC management is dishonest in this, they are just taking a chance that their bet that these bungalows will be attractive to members is incorrect. As others have said, though, it's the owners who are taking on the risk, not DVC management.
And the risk isn't really as bad as everyone makes it out to be because if no members book the bungalows with their points then DVC management will adjust the point chart for PVB and make the bungalows cheaper and the studios more expensive.
If someone straps themselves and buys enough points for a week stay in a studio and the points may increase in the future by 10%, I consider that a fairly large risk.
And if that doesn't work then we'll end up with another SSR where a lot of owners book away from SSR which often leaves SSR inventory the only inventory available for last-minute bookings. In this case the Poly bungalows would be available well into the 7-month window.
Can't compare in any way to SSR.... they are empty because of low buy in for longer term of ownership compared to the older resorts, and less desirability. When the bungalows are empty it will be due to planned exclusivity. Poly studios will be booked before the 7 month window , and no one will buy planning to stay in the bungalows more then a couple nights once for the experience.
But no one really knows what will happen and I don't think DVC management would have built the bungalows if they really thought that no one would book them. It's much more likely that they just made a bad call. It's probably just as likely that the bungalows will be popular and it's the posters on this board who are making the bad call. lol
For reference here's the total points per resort that I got from another board: