While doing some Colt research, I found an article on his 1923/4 rebuild of Muirfield, which said that, though the main construction work was done, the position of bunkers was still largely to be decided, in the light of how the holes played (presumably therefore mostly by Robert Maxwell, who collaborated closely with Colt on the project).
I wonder if this contributes to the regard in which Muirfield's bunkering is held?