The coaches go to clinics, usually annually, for the latest and greatest in instruction, teachings, debate, and rules. When you talk about latest and greatest instruction, chances are you have chosen a side and are adamant about your beliefs. They are as well. Latest and greatest instruction for a task could still be technically different. Take stride vs. no stride. Some elite, up to date programs teach stride, other elite, up to date programs do not.
Not talking about stride vs. no stride.
How about this: ''Put ball on a tee. Keep shoulder in. Extend arms and knock the ball off the tee with the knob of the bat.''
How about this: ''Get the foot down early. When the ball is coming out of the pitcher's hand, you need to be getting the foot down.''
How about this: ''OK, throwers, we're about to do L-drills.''
It sounds like you are taking this thread as an on college coaches, as though there is no advice that parents or players could give them. They've mastered it.
A question you did not answer:
Is there nothing that a coach could teach at a camp or clinic that would make you less enthusiastic about that particular coach or school?