Bird, basketball has been different than football regarding commitments. In football, commitments are basically worthless until a player is signed. In bball, recruiting usually the instant a commitment is made. Thus, trying to change a player's mind after a LOI is signed is beyond rare.
Add to the above, that the coach who got the signing would have to give a full release and this would happen within the ACC on such a limited basis that a simple rule of, if the coach gives a full release, the player is free to sign anywhere, would be fine.
Add to the above, that the coach who got the signing would have to give a full release and this would happen within the ACC on such a limited basis that a simple rule of, if the coach gives a full release, the player is free to sign anywhere, would be fine.