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The good: her pre-motion and drive are a solid foundation.
The Work: she is definitely HE on the backside of the circle and at release. Arm is locked out and palm is down. This causes her to push the ball and hang on to it too long. Her front side resistance needs work also. Needs to stay way taller at release. Could be HE symptoms also.
Start doing this slowly (can mimic the motion without throwing the ball). Don’t allow her shoulders to move (very important). Once she looks good doing this add slow arm circle. Once she can do that do slow arm circles with a small stride and drag.
One simple que I’ve used with HE pitchers is to simply throw through their body, not around it. HE are taught to slam the door at release. I’ve seen HE pitchers fix this and begin throwing with more IR. Hope this makes sense! Start now!