If she wants to be a pitcher she needs to be on a team as a pitcher. My dd was taking pitching lessons but was on a team at another primary position, she never really seen the improvements as we felt she should. She changed teams to be able to pitch and she has really improved. In game circle...
With my dd sometimes she will tighten up in a game and throw high . It seems she is trying to guide it instead of trusting her self and just throwing it.
I like the change early and often when its on . But I think it needs to be thrown even if it's not on just to give the batter something to think about.
It kills me to see a pitcher getting hit hard by several batters in a row continue to throw just fastballs .