I'm in agreement with this. It was hard to hear, but after listening to the hard to understand parts a couple of times it was clear what he was getting at. What I looked at in the end, was whether Perry improved on hitting the ball flatter and lower - which he did. When he did that RL then had him mix in "Academy" balls with the lower balls, reinforcing that the Academy balls are not inherently bad.
So does that mean that saying "not like that", "I don't like that ball", "c'mon", "go", "close it up" is good feedback and therefore good coaching?