Maybe not the death knell, but there will be a backlash and that may raise the question of whether this was a step too far
Love it or hate it, there is always the issue that the traditional US Open set up was distinctive. It may have been boring, but it was distinctive, and thus winning the career grand slam meant something as one had to win in such a wide variety of conditions. There is some substance to the argument that we need that one nasty dictatorial slog once a year.
Pinehurst was great as being a nice middle ground, but to my eye, this is just a bit too goofy, and I think sponsors and others will not want it repeated