I would think the age of the player could come into play in deciding if a successful hitter is changed from their current swing. A 10U or 12U player can very often have a bad swing, but end up with great success if they are a great athlete. However, if they are not given coaching to improve the swing, at some point as they move up the age groups, they will most likely fail. There are very few (if any) 18U hitters that play against good competition that are successful with poor technique. [That doesn't mean that every hitter must look identical when they swing.]
Excellent points. I witnessed this phenomenon as my DD was coming up through the ranks. She had a few team mates who were athletic, and against decent 12u pitching could put the ball in play quite often. These were kids who didn't put in the individual work necessary to progress in hitting skills. Therefore, they began struggling at 14u, and those struggles became fail at 16u. Had they been working with a quality hitting instructor, chances are that they could have progressed in skill as they faced tougher experienced pitching. I have video of some of the "younger years", and I've seen some ugly swings!
Regardless of how tough you think 10u or 12u pitching is - it ain't nothing like top shelf 16u or 18u! 10u and 12u are the rookie years, and a LOT of learning and development is taking place - with MANY "mistake pitches". A hitter at 10u or 12u can often get it done with sheer athletic ability, and many do. But come 16u, a college bound pitcher will pick apart obvious swing flaws.
Don't get caught up in the "linear vs rotational" debate. But DO get caught up in a campaign to keep your DD on a path of constant improvement. That doesn't mean change your DD's swing mechanics just for the sake of
"she doesn't swing like so-and-so who is a good hitter".
NOW is the time (off season) to be working hard and smart on hitting skills - with a KNOWLEDGEABLE instructor.
You want your DD going into college with skills
already in place -
the skills she was recruited for. If those skills are deeply rooted, and a kid is having college level success, it's doubtful that any coach would try to change them (unless they're an idiot). But the idiots are out there!! Besides, the deeper rooted the quality skills are, the harder it is to change. Remember - the opposite is also true, so the longer your DD is taking BAD swings, the harder it will be for her to change.
Odds are that a "certain" southern Ohio kid who is putting up some huge numbers at a "certain" Horizon league school will continue. Pssst... Not telling you what to do, but if I were you, I'd look into the type of teaching THAT kid received. You can't argue with results - even when pitchers are given "chalk+" (for you BD
)