Thanks for the feedback all. She claims the high hand position is the most comfortable stance for her and since she has had phenomenal success as a hitter I was reluctant to push the issue too much. Her Zepp stats also consistently trend full green so I was not too concerned, but based on these comments I will work with her to get this corrected.
I was also concerned about the slight helicopter action at the end of her swing, but it sounds like the hands and elbows are the place to start.
Thanks again, really appreciate the feedback.