Sounds like it's a swing issue as others have stated, but just another thought. Did she happen to switch bats, or is she using the same bat as last year but it has now been used for a few seasons? Not as likely, but you could be dealing with a dead bat. I have seen it happen with the composites. They can lose their pop after long heavy use.
Yes she did switch bats.. CF9 to Easton Ghost.. according to what everybody else says, The Ghost is one of the hottest bats on the market