Define open vs close. Pitching seems to be oppo of hitting in regards to open or closeIn this drill (assuming it's a drill versus her full motion) her back leg is really acting as an anchor holding everything back.
she could really benefiting from getting her back heel off the ground work on getting a push off that looks something like this and then focus on keeping just that toe dragging the ground and the heel either just doing a quick tap or bounce off the ground or not even touching the ground at all. She actually per your previous post appear to her some bend in her arm and ball almost completely up and some whip going on now we just need her bottom half to cooperate. My guess is she was taught doing drills throwing basically sideways to emphasize release point but when incorporated into full motion does not let her body naturally close but instead tries to stay open.
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Based on the clip above, I'll stick with my earlier suggestions regarding posture--in part by working on better back leg adduction (drag the toe toenails.)
Just snap ups.. like Balswick did in the video clip on page one.How do u pitch off of a big bosu ball? Any examples.