You'll have to bear with me for a minute to understand my question as I am not arguing that follow-through is a bad thing, or advocating a swing with minimal follow-through, just trying to understand the purpose. Some hitting coaches teach the importance of follow-through to the point of having batters hit their own back to show they are "swinging all the way through". Scientifically, the moment a ball leaves the bat, the maximum amount of energy has already been transferred.
Given this, is follow-through just a way to teach not decelerating the bat prior to contact or a way to dictate swing path, or both? Secondly, is it possible for a girl to have a "good swing" with minimal follow-through so long as there is no deceleration prior to contact?