18 years? Where did you come up with that? To my knowledge he was there one year, 1937. And of those changes I would say #10 was an improvement (though I do like the design of the old 10th) and #7 was not an improvement. I also have my doubts about the changes to the greens at #1 and #14. Early photos of the 14th green are more or less identical to today's green. You might want check your facts before making bold assertions.
How much of the above is just stuff you made up?
None of it was made up, although my opinion (old vs new) are obviously my opinions. Our opinions are our original thoughts, at least mine are, and this case my opinion is based on studying the designs of the 7th and 10th.
As far as the 1937 changes are concerned the information comes from a couple of contemporaneous articles from January 1938, one from the Augusta paper written by Robert E. Barlow and the other from the Chicago Tribune written by Charles Bartlett. They both basically say the same thing: the 10th green was relocated, and the 5th, 7th and 17th greens were changed, basically softened, to remove the abruptness of the 'sand dune' contours. I'll send you the articles if you'd like.
Where did you come up with the idea that Maxwell was fixing ANGC for eighteen years?