It's part of a deliberate strategy...look at where they've converted/built since iger took over...all places that struggled to fill...
Part of the problem was that overbuilding in the first place. Like 2000 rooms at Animal Kingdom Lodge.
But reduced demand for Deluxes has always been a byproduct of DVC sales. Anecdotally, most people buying DVC points are those who were previously cash guests at deluxe or moderate resorts. Sell people into a DVC new construction like VWL - Boulder Ridge (which was an add-on to the original hotel), Beach Club Villas (same) or Saratoga, and suddenly there aren't as many people willing to pay cash for those and other locations.
As that reduced occupancy hits certain places harder than others, keep looking for the best ways to make use of the resources available. In the case of Jambo, WL and Poly, it included turning hotel rooms into villas. Places like BLT and now Riviera aren't direct conversions, but still sacrificing hotel space for DVC.
Diabolical plot? Sound business plan? Take your pick.
But now cheap hotel isn't in the strategy...
If they price themselves out of a particular market, the strategy will backfire. By most accounts park attendance is down, so now we see Annual Pass promotions, MYW ticket specials, restaurant discounts, etc.
If Disney uses the gondolas as an excuse to jack-up the rates 25% on POP, AOA and CBR, and a half-million families per year still flock to fill those properties, I know where I'm pointing blame.
so they string a ski lift past, build a really dull looking Marriott...
Personally I'm in no rush to pass judgement on Riviera based upon one piece of concept art and mention of just two resort amenities. 8-10 years ago, DVC management made some questionable design decisions with the likes of Bay Lake Tower and Kidani. More recently, I think they've done a better job with in-room design (Grand Floridian, Poly) and adding/enhancing resort amenities during the WL renovations.
This will be the first entirely new DVC project since...probably Saratoga Springs 15 years ago. No renovations or existing theme to mirror. Hyperbole aside, I'm curious to see what they come up with.