I see, so it was your opinion that Martinez was trying to ingrain a feel of staying over the ball and not rotating. Much better. I disagree with your opinion.
You made the unsubstantiated claim that Martinez was trying to ingrain a feel of not rotating. So you are Martinez? Hardly. Stop with the nonsense already.
Pros routinely start their BP settings with a round of opposite field hitting.
Do you have examples of professionals swinging with the lead arm pronation that was demonstrated?
The follow up description of this lead arm pronation being critical to staying through the ball is not correct. Instead the top hand passes beyond the bottom hand.