In the girls DRILL swing her rear leg is virtually non existent because the DRILL is isolating the barrel turn. Add in a turning rear leg and her DRILL swing looks much different is my bet.
The girls front elbow is the tell that she is not turning the barrel. It goes first. It shouldn't.
I don't see the front elbow move first.
I don't think the girl should be perfect, just that in all the swings posted the elite hitters hands turn as the elbow lower and the girl the hands turn very early and the back elbow doesn't lower as quickly.
Just thought the barrel turn is a little over baked.