My guess is even if occupancy were to drop at YC, in order to preserve future convention business, they'd expand DVC at BC and push the CRO from BC to YC to fill YC rooms.
After all, at either place, dues are going to continue to help pay for joint amenities.
In fact, there's a rumored expansion of BCV in the works and I think that more closely matches what DVC seems to be planning based on VWL2: going back to resorts every 25 yrs to sell points.
In about a decade, that'll give DVC a perpetual inventory plan.