Okay so you don't believe us as to the effects of swinging down vs up.
Driveline a baseball science lab will show you. They are hitting plyoballs, sand filled weighted balls that we normally use with our pitchers.
The first swing is the traditional short straight to the ball teaching in order to create backspin.
The second swing is the modern style. Swing slightly upwards get on plan and behind the ball.
The video speaks for itself.
Know the Why.