Agreed. High-level college baseball is often more competitive than Short Season, Low Class A or even mid-Class A ball. By the time guys reach fast Class A or Class AA, they're generally a bit older and more seasoned (i.e., better prospects). I'd also point out that MANY high level college kids were drafted as 18-year-olds, but chose college as their developmental venues. They are essentially Class AA-AAA prospects after then junior years, when draft eligible.
As to your question, having been at training sessions overseas/elsewhere, I can say that many include multiple, progressive "stations," each manned by a trainer. I would love to see more of that here.
