Batting Coach Question

From Ask the Baseball Pro:
Agnetha wrote:
My son has always been a fantastic “slugger”. And his team as well, he is 14. Now a batting Coach is in the picture and changing just about everything about his batting. Now his at-bat is not very good at all, the team as well. The boys ground the balls to short or second throughout a whole game. Very painful. It’s been going on since October 07. This Coach is “the best batting coach around”. My Question: Do you mess with a natural hitter ?
Mom
From the Baseball Pro:
Agnetha,
If your son is a natural hitter then I would say no, do not mess with him. Many times when coaches start messing with a hitters mechanics they forget what they are trying to do, simply hit the ball. The hitter becomes so worried about their hands or feet that they forget to use their hand eye coordination. So I would recommend that you tell your son to just try and hit again and not worry about his mechanics. I hope this can help.
Your Baseball Pro, Steve Holm

P.S. This is always difficult. Any possibility of changing coaches? Each has his own style.
Host Mom, Jean