With due respect , those are a lot of words that don't explain much.Mike Mac, I agree that it is almost impossible to replant and add a second push/drive (I have seen this)... PLUS+ a second push would negatively impact their speed/accuracy (and this was the result). However, wouldn't you agree (just like Men's fastpitch), that a replant creates a "pivot point" that allows an additional energy transfer to the resisting frontside landing? The legal pitcher has a continuous drag... and does not gain additional energy transfer... since they do not have a pivot point during their "launch to landing". In my experience... and using super slow-mo videos (240fps/480fps) evaluations of these "illegal pitchers"... their replanted "pivot point" is especially effective at increasing spin-rate, which is caused by decreasing the length of the energy transfer... and thus slamming the increased momentum into the front side landing, creating more energy. In addition, it is very deceptive to most batters, due to the pivot... which looks very different than a continuous drag pitcher... like there is a hitch during their release making it harder to time/see/pick-up (hence the success of Barnhill's replanting).
If you could pitch yourself, you would easily and quickly realize that the first half of what you've said isn't true.