Hey and welcome to the forum.
The first lesson US tennis needs to learn is the change of pace tennis takes nowadays. Surfaces are being slowed down and US tennis has always favored a fast surface where points are short and where serve or serve and volley are key.
By slowing down surfaces, US tennis must adapt by unlearning raw power and focusing on agility. After agility is taught and the return game is mastered, a player can focus more on power and complete the circle to create a game focused on return with a precise powerful strokes.
This is valid for any kind of tennis nowadays. The surface has always been a key element to changing tennis.