Update that the flake has now fallen down – not sure of current stability of area.
It has been reported that the large flake at the top moves significantly as you try to climb it. You can see light from under the flake and the accumulated soil trapped behind the flake is collapsing. A good place to avoid until the situation is resolved. Be aware that other routes on the lower part of the buttress (and the hillside below the buttress) will be in the line of fire should the flake collapse.