This hitters 'hips fire' before her hands move forward. See what I mean about 'not everyone agrees on the 'proper sequence'.
Picture if the bat was held vertical during the 'loading' and over lapping/unloading. Wouldn't be that bad of a swing now, would it.
Are the hips firing or is she pushing forward?
Is this a classic shift and slot? I see some sitting, but not sure if she is just pushing forward that is creating the back knee to flex.