The most important question is how is she missing the outside pitch? Hitting location pitches is an easy fix once you know what the problem is. 99 out of 100 times it's being too far off the plate
Here's what I have been teaching and it's been working pretty well with a few of the players I coach. On the outside pitch maintain the hinge angle of the bat and wrists and do not roll that top wrist. A lot of people will say "let the ball get deep". I don't know how you can judge "deep' by 6"-10" when something is traveling at 50+ mph. If you maintain the hinge angle and then extend through - then the ball is deep and going opposite. If you roll your wrists at contact you immediately advance the bat head about 6", the ball is no longer deep and you hit it off the end of the bat. Thoughts?
Forgot to mention she is a lefty slapper. Her main problem is that she pulls almost everything she makes contact but mostly with the tip of the bat. Thanks to all!!