Ahh that cage video was helpful! She does still look like she's trying to keep the back hip from turning. But I would also add in having her work on her keeping hip hinge during the swing and doing one handed drills like this...
Hey there! The main cause is that her hips are starting and then basically stop rotating too soon. To get the idea, try taking a swing without rotating your hips at all. It creates a very "around the ball" swing. Now she is moving them at first, but because she's essentially stopping them too...
Sorry just saw that you posted the video. So yes, it is an issue of her understanding WHEN to start. She should have a slow controlled load and stride. Without that her timing is off because she's going from going "fast to fast." Check out this post...
Also check out this video. It's from a...
It's pretty common to see hitters do something very different off of live than they do off tee/FT. It sounds like it's a timing issue. Basically she needs work on deciding when to start her swing based off the pitcher. If she's starting too early she will not get to a good launch position (heel...