Philippe:
Crystal Downs did build one new back tee, extending the 13th hole by about 30 yards.
I didn't know it was going to happen until 3-4 years ago, when I went out to play there with Ian Baker-Finch and the head pro, Fred Muller. When we got to 13 I noticed the new tee and asked Fred about it, and he said a couple of the green committee insisted on it. Of course, our threesome was not playing from it, and after we teed off I asked out loud if our group wasn't going to play it, who the heck would?
P.S. Your first paragraph reminds me of my favorite renovation story, also courtesy of Mr. Dye, at White Bear Yacht Club. The course has some very severe greens, and about 20 years ago they decided they had to do something about #14, and a member knows Mr. Dye so they ask him to stop in and visit. He arrives, and the whole green committee goes out with him to look at #14 green. He stands there for a couple of minutes looking at it, then says, "Man, I wish I could get my guys to build greens like that." And they all drove back in, and left the green alone.