It depends upon why he is leaving and when (or if) he could be eligible to play (wouldn't he have to sit out another year and only have 1 year left?). Sometimes people have a legitimate reason for leaving.
BTW - It is my understanding that Coach Bro is cleaning house on his defensive coaching staff. If they are changing systems, some players might (correctly) determine that they are not a good fit for the new scheme and want to move on. If our scheme fits his playing style and there is enough eligibility left to make it worthwhile, why not take a look?