I was extremely disappointed with the set up on Sunday. It was Pro-Am pins and the USGA totally overreacted to ridiculous moaning on Saturday.
Were there tough pin positions on Saturday? Absolutely. A couple of them maybe bordered on the unfair. But so be it. If you can't stop the ball from in front of the pin (like on 15 on Saturday), why not play long with your second shot to leave yourself a relatively simple 2 putt / up and down?
But overall the set up on Saturday was very good I thought. There were opportunities out there, specifically if you plotted your way around the course. Rose's front 9 was a case in point. He hit 1 green but shot level par. He missed in the right spots. Compare that to DJ who hit 7 greens and was 6 over.
Shinnecock on Saturday made them think. And - generalisation alert - pros don't like that. They want to be able to focus on the yardage only. At Shinnecock on Saturday poor shots were punished, but poor decisions and poor strategy were punished even more. I love that.
On the Sunday, you had players hitting poor shots which were stopping on the green or spinning back. That is absurd. DJ hit it long on 1 and should have been punished, but it stopped. The set up took so much of the strategy away, and allied with the pro am pin setting it turned it into a regular tour event not the US Open.
All they needed to do was say we got a couple of pins wrong, because that was all they did. There was absolutely no need for them to capitulate to the moaning from pros who hate being made to think and actually execute.
According to the New York Times, "On Saturday the first 11 groups had a scoring average of 73.6. The last 11 groups — the top 22 golfers through the first 36 holes — averaged 77."
That's bigger than the difference between the average scores on Saturday (75.327) and Sunday (72.18). i.e. the course changed more within Saturday than it did between the two days.
Normally I expect the leaders to average better on Saturday than the guys who barely make the cut. If so, the course probably played 4 to 5 strokes harder in the p.m., compared to the a.m.
That is why the USGA changed the setup Sunday. Not due to player grumbling, but the huge disparity in scores that, due to not-so-abnormal conditions, put two guys one stroke under the cutline in Sunday's final group. They wanted to make sure that didn't repeat in the last round.
Did the USGA overreact? Not so much IMO. Koepka was the only one of the four overnight leaders to shoot under par on Sunday. No one close to him shot under par either. Only one other contender (DJ) matched par, and he had to birdie the 72nd to do so, long after his chance to win had evaporated.
btw I don't believe Rose plotted his way around the course on Saturday, playing a thinking game, making sure he missed in the right spots. IIRC he hit nearly every fairway. But he had no clue where his irons (mostly short irons) were going. He was lucky to miss in decent spots, and rode some short-game/putting magic to stay in contention.
Similarly, my impression was that DJ's putter turned ice cold the front nine Saturday, and that's why his score ballooned up, not because he got out of position.
I had no problem with Saturday's afternoon setup/conditions. It was shocking but also entertaining to watch the best golfers in the world bounce their wedge shots off and over so many greens. I do wish the morning guys had faced the same overall conditions.