Just chiming in - I think what is missing in her swing is intent to do damage and not so much mechanics. It’s just not very violent/aggressive looking in the game clips.
I think that’s an intuitive feeling of slowing down so one can HOPEFULLY make solid contact w the ball. Swinging hard and missing usually means you failed and looked like a fool doing it. Just like a bad golf swing. Slow down and try to square the face etc etc. jmo.