"More difficult" is a relative term. Based upon posts here, it sure seems like an awful lot of people would have CR at the top of their 7-month preference list. While it's true that for every CR room booked at 7 months, Disney would be able to remove a room from inventory at SSR, OKW, BWV, BCV, etc., that seems like a trade-off most people would be comfortable making.
Owners would still have their 4-month priority at their home resort.
Legalities aside, I just don't see how it would be "devastating" to DVC. It's simply trading availability at current resorts for another highly-popular destination.
Actually, if they make the point requirement per night high, and Disney retains the points, they could remove
several rooms from inventory at the other resorts.
For instance, say a studio at CRV is twice the number of points per night as SSR, and Disney
owns all the points at CRV. Is Disney simply going to say "Oh, no one wanted to pay cash for the CRV room, I guess I'll let these points expire." Of course not, they will reserve two studio rooms at SSR for those points, and try to rent them out. Even if they only rent one, and let one set empty, they are break even, assuming the cash rental prices are within the same range.
But if Disney were to actually consider this scheme, wouldn't it work out better for them to simply put cash suites at CRV, and let us trade in through the Disney Collection like they do with other resorts? What would be the advantage for Disney in making it a DVC resort, if they want to hold all the points? That way it would also be easier to
increase or
decrease (yeah, right) the number of points with the ebb and flow of the economy, as Disney collection points are renegotiated every year AND they could charge a trade fee or additional resort fee if they wanted to, including charging for internet services, as it is not free at regular WDW resorts for DVC members.