>>> First let me say how happy I am that I found this site.
I have seen fantastic rotational hitting at youth levels. I have also witnessed trainers trying to change this to be more linear. I mostly see this when an instructor is forcing a batter to hit to the opposite field.
What is the adjustment the hitter makes to outside pitches? If the shoulders are rotated away, does the hitter have difficulties outside? <<<
Hi Willy Boy
As your post points out, one of the biggest hurtles a young batter acquiring high level mechanics must overcome is the negative influence of their linear coaches. Although I have noted a positive change in some college and high school coaches, it may require a couple decades before most kids are instructed with sound rotational principles.
As far as rotational hitters being able to adjust for inside and outside pitches, the post from the archives below has video clips and information that should answer your question.
Adjusting to the inside/outside pitch
Jack Mankin