Did she founder where she is now? If so, then if you take her and keep her at the same place would be a bad idea.
If the rotation is not severe, founder can indeed be corrected, but it can take 1 - 2 years. In my mind, if the coffin bone can move into the wrong position, then it can move, period. That means it can move back, baring other limiting physical damage. The issue for me would be to find out why
she foundered. Was it feed? Was it improper hoof care? Was it an illness? Was it due to an injury? Was it due to pregnancy? Honest answers to these questions, if you can get them, will go a long way towards preparing for the future.