One part of the book was particularly enlightening for ME, the concept of cocking the left wrist.
I have been so focused on a flat left wrist that on video my wrist is arched big time at the top of the swing with no wrist cock. I think this also goes back to keeping the left wrist flat and "dynamically flat" that 12pb educated me on a few weeks ago. By consciously trying to just let the left wrist be cocked by the right elbow. I have made some progress, we'll see how it goes.
I personally like the book and like how Clampett presents the Machine. Especially, the idea of looking past "stylistic" stuff and focusing solely on the dynamics.