Somehow I forgot to address this. Maybe bc you didn’t tag me. Here are a few of the greats showing hands first, while the shoulders stay in place. I understand why you think the shoulders move things. But as you can see the top hand is moving way before any shoulder movement has occurred. Shoulders swings are long, slow and not adjustable.
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A great swing will have the shoulders still countering while the hands are attempting to come forward. Like the examples above. The hands are applying forces down, out and forward. You actually swing against your shoulders and to an extent the hips. I prefer to teach that through sequence more than resistance.
Usage of the hands is the only way to not get ‘front shoulder pull off’ which so many kids suffer from which ends careers early. That force pattern always creates the inability to hit the outside pitch and/or off speed.
You are looking at adjustments, inside pitches where the hands have to get in front of the chest. Not the same as hitting an outside pitch the other way.