Tommy, Forrest, I know for a fact that altering that hill is not in the current in the works.
Bill, The 12th green was regraded. I recall that from my own memory.
As stated aove, the 13th had the most significant changes. Not just regrading but widening and a completely new greensite some 60 yards short of the original.
Don, I can't be definitive but I'd say Bent.