Very glad she found a team and school as as she works very hard at her sport and from what you described softball is a big part of her life.
That I said I would tend to agree with what @privatebanker said particularly as you mention it is known as a great school. Or at least discuss and consider, which I am sure you have, how will she feel at the new school if she does not fully recover and does not get any playing time, or gets injured again and sits out a season, etc.
As you know, only 1-2 pitchers get the bulk of the playing time and injuries do happen as well as new recruits showing up, coaching changes, etc. Best of luck to her. I hope wherever she ends up she has a good college experiance.