Great news. Not trying to be a downer but tell her to wipe the smile off of her face and get back to work.
I would not be so anxious to move to front toss or any kind of toss from her normal stance. Do not give her any reason to go back to her old swing. Stay on the tee, keep doing the knee drills and I would add in a fence drill with a tee. Once she forgets what her old swing feels like I would start doing some front toss stuff from her normal stance but a limited amount.
Good Luck
Thanks HYP. I agree. I am not trying to rush the process. I almost wasn't going to let her bat in practice but she wanted to and her tee work seemed to carry over to her BP which was cool to see for both of us and showed her what we were doing was paying off.
I like the fence drill concept to keep her bat path short to the ball but possibly somewhat modify it using the punching back instead. I was also thinking of positioning the punching back behind the plate , basically at the back foot and continue doing deep tee work (back hip, bellybutton, front hip). The punching bag location combined with the deep tee location really seems as if it would restrict her to only one possible bat path that would allow her to hit the ball and drive it.
Also, I would use the punching bag in the same position when ready to move on to soft/front toss. On soft toss I can toss the ball deeper (most likely tossing from behind as suggested), which will keep her swing short. With front toss, the bag location will help restrict a long swing somewhat, but she has to have the discipline of letting the ball get deeper into the zone. I probably will only do front tosses on the outside part of the plate and have her hit oppo for a bit. Then start mixing in pitches outside (rf), middle (cf), outside (rf), middle (cf), outside (rf), middle (cf)...etc. Eventually I can work in the inside toss and have her pull to (lf). Hopefully this makes sense...