I wouldn’t transfer if it’s a great school, her academics are excellent and she’s doing well socially.
Starting over sucks and she will be new kid as a junior. This is college not softball pro training. I know this sounds a bit harsh. But I am totally being honest.
It is really hard not to play and knowing you can. Why not work out really hard and get in top shape and rehab the arm, and reassess for the junior year. And wow them into a spot with her skills. The Michael Jordan approach after being cut.
Coach may be gone by then anyway with all of the turnover.