Let me add to the above post, get a bucket of balls, a Tee, and just work with her 20/30 minutes a night on staying inside the ball, level to the ball swing, balance, and follow through / finishing.
At her age doing this will have far more benefits than changing bats, and everyone else at the field will take note!
At her age doing this will have far more benefits than changing bats, and everyone else at the field will take note!