Disney hotels rarely operate at 100% occupancy...even less so without any form of discounting or promotions. It really doesn't make sense for them to use ROFR as a way to boost hotel inventory. As long as you've got some rooms sitting empty, why spend thousands to acquire more? There aren't a lot of people out there thinking "I really want to visit Walt Disney World but if you can't give me a deluxe studio at Bay Lake Tower, forget it."
If DVC ROFRs a 200-point contract, they're going to pay $20-30k in real money to the seller. In return, they only get 200 points worth of rooms per year, just like a member using those same points. And if members have already taken all of the desirable inventory 10-11 months into the future, they may not even be able to grab meaningful rooms for CRO until nearly a year down the road.
This is also sort of the antithesis of fretting about supposed high DVC prices and low sales. DVC has 2-3 million unsold points in Grand Floridian and Riviera. I don't see why they would aggressively ROFR other resorts for room inventory purposes while worrying about supposed "slow" sales at two resorts where they are holding points.