TY the goal is to tighten things up. A step at a time. So, I asked her not to rotate the shoulders at all. Coil and load rearward help to lock her shoulders down with her bellybutton also going rearward and then just snap the barrel.
IMHO she's still a bit 'tall" in the swing. Also try and get her away from looking at the ball on the tee. Look through the net at the "pitch" even if she swings and misses at a few. We put a ball on a tee on the other side of the net to give the hitter perspective.
Also move the tee around. No pitcher throws the ball in the same location 20 times in a row.