Frank and John, if you are interested, I received a reply on my queery about recovery plans for this section of the reserve.
It seems they are quite busy trying to rescue the situation. Among others they have recently increased the size of this area to double it's previous size, they have moved some of the bulk grazers, they are planning to remove more animals, and they have started with soil retention operations, including making terraces on contour lines, plowing, planting and packing brush over newly-planted areas.
All measures that sound good to me.