Agreed better, but I think he has to play a lot more aggressive, i.e., closer to/inside the baseline, and serve not just better, but more aggressively. He can have a high serve pct., and yet not make the impact that he needs to to win the USO. Let's see how he does in Cincy to adjust his game. This is his perfect chance to walk into the USO with a lot of confidence.
I think he can win the USO. Still don't agree with criticizing a definitive win. Each opponet calls for something different.
In general, I'm not the kind of fan who think I know better than Rafa what he should be doing.
He had a lousy day against Shap but I don't draw longterm conclusions from it, unless I saw the same things here. Is that what you mean by adjust his game? Or adjust to HC? He put Coric away very easily before Shap. Fist time he played Shap, and you saw how big Shap's game can be, and he's a lefty too which sometimes torubles Rafa.
The worst with Rafa are the short balls, overtopping. If you really know his game you know that's not a choice, that shows a lack of confidence, and it's always spells a loss, unless his opponent chokes.
Rafa doesn't bother with aces when he doesn't need them. Somedays he can pull a few out of a hat. He's near the top of the server stats on the atp leaderboard without being technically a big server like Fed or Raonic or Kyrgios and that speak volumes about the quality of his serving. This year. Vastly improved.