BB does seem to place a lot of value on mentoring new coaches and establishing a coaching tree. My guess is that if coaches under him are able to get better gigs on other teams, he encourages them to do so.
This probably won't make them less competitive. If losing a few position coaches and a coordinator were going to torpedo a season, it would have happened already.
This probably won't make them less competitive. If losing a few position coaches and a coordinator were going to torpedo a season, it would have happened already.