It seems to me that there is a fairly straightforward solution to excess points in the 2020 UY, that Disney could implement. Disney has only declared 28.3% of the Riviera resort for
DVC. If Disney wished to accommodate the excess points in the system, all they would need to do would be to immediately upon reopening, declare 100% of the resort for DVC- and simultaneously limit or suspend direct sales, such that the existing members could use their points at RIV before those new contracts are sold to new home owners. This would even help the "white card" members, because without a doubt some "blue card" members would switch their bookings to RIV, thus freeing up inventory in the legacy resorts. And such a strategy could be carried forward when Reflections opens, if excess system points stock still exists at that time.
To be clear, there is absolutely nothing that would require DVC to adopt such a plan. And it would cost them a considerable amount of money to do this. But it seems that it would fully rectify the looming points excess crisis, buy a ton of goodwill from the membership, and get the existing system back on track.