Hardly anyone transfers with a coaching change, no matter how much players behind closed doors said as much when it was a hypothetical. Some are told flat out they won't play or fit the system, so you get a few. When reality hits, they stay. Especially a qb who has earned the #1 spot on a D1 team. That's not easy and the idea of sitting out a full season brings them to reality fast. ED will be all in, imo.
I always felt this way but there are coaches who like t clean house so to speak. Not sure how many transferred but I'm pretty sure Marrone 'lost' like 15-20 kids in his transition. Think edsall to MD encountered a similar exodus.