FWIW, Perhaps this is a Disney only devaluation as I just checked RCI for other properties that we follow and didn't see this error. If Disney only, this is a significant devaluation, however we've never been able to get a match in Calif or HI and we visit Orlando once every 7 - 10 years and there are many places to stay so no big loss.
If this is a signal of things to come more broadly in RCI, then this will impact HGVC much more than MVC because the system has fewer locations. It's sad that the FAs in Mexico are now mandatory AI which makes them economically unfeasible. However, if they open the HGV cabo and the points are reasonable, perhaps we won't need RCI.