Wellphyt what drills do you suggest for the bat drag. She has not been taught to take her hands to the ball and swing with level sholders. She is being taught to tilt the sholders to match the plane of the ball and rotate around front hip but she is 12yr old and don't always get it right.
She will never figure out the high level pattern if she trys to rotate around her front hip. That cue alone could be contributing to the bat drag. The only way to rotate around the front hip is to shift onto the front foot and then swing. It's almost impossible to do that and not push the hands towards the ball.
In my experience, Epstein's "Torque Drill" is an excellent way to teach how the shoulders tilt and turn in the high level swing. There is another excellent drill I recently discovered called the "Stretch and Fire" drill, that has helped my daughter better feel how the two pivot points (back hip and hands) sync together. It's the one drill my daughter actually likes doing. The drill comes from a hitting website.
I do believe there is a lot to be learned by studying the barrel path of hitters like Bustos, Bonds and Williams. IMO, the technique that these hitters are doing to develop the early barrel movement is a big key in solving issues like bat drag and pushing.