I understand what you're trying to accomplish, but that's a dangerous pitch if you miss even a little bit, and extremely hard to throw. She will need to step so far to the left to get that pitch to the correct part of the plate that good hitters will spot the change easily. Watch some high level softball and I don't think you will see a single RH pitcher throw a screwball to that side of the plate. I know you said you trust her pitching coach, but this combined with the idea that she has to drop one pitch to add another one would cause me to question if I was in the right place.I follow you more now. What i meant is she is learning to throw it at the lefty and break on the inside or at least force the batter to bail on it. Nice set up for away fast ball depending on situation. Similar to how you use an inside breaking ball/slider against a righty to catch them flinching. She currently uses it against lefty's to appear to head into the zone but break low and way outside.