I will say, that I have no great interest in getting involved in Open-doctoring courses like these. There seems to be no upside in it. People blame you for whatever the hell happens the week of the tournament -- weather, set-up, who plays lousy -- as if building a new fairway bunker downrange of the old one really had anything to do with anything.
In the old days, in fact for most of the time until the recent past, people did not look to architectural changes as a necessary prelude to a major championship. [The only real exception to this was Rees' father's few years at publicizing himself as The Open Doctor.] It was considered enough to tweak the set-up of the course -- grow the rough, firm up the greens, etc.
What's changed is that there is no slack left in the set-up of courses. The members have demanded tournament conditions every day, to the point that you can't make the greens any faster for the PGA than they were for ladies' day. Indeed, they've made the greens so fast that they have had to come in and flatten the best greens -- because you can get away with a severe green that only has two reasonable hole locations for four days of a championship, but that green won't work for 365 days of member play.
Rees could not have ruined Atlanta Athletic Club, because it was never a great course at any point in history. [Nor were Cog Hill or Torrey Pines, incidentally.] But there are other championship venues I'd prefer to see left alone from silly architectural tweaking.