Agree that the way he left the team could've been handled differently. I'd like to think when he first arrived, he was committed to playing at least 2 years at BU. I've also been led to believe that when his rights were traded to the Wild, his thought process changed. I think that trade planted different thoughts about which path he should take to get to the next level.
Having said that, if he wasn't 100% sure about BU being the right place for him before starting his Sophomore year, I wish he had decided before the start of that school year to move on. However, I recognize it's a tough decision to make and hopefully it's an experience that he has learned from.
I'll also say this: Over the Summer I watched an episode of the Wild's behind the scenes series "Becoming Wild" where Coyle was the subject. They followed him around during the 2013 off-season back home. Watching that episode, one would have no idea he even played at BU given there's zero reference to BU (but plenty of references to Weymouth High, S. Shore Kings, USWJC teams, Saint John SeaDogs). Also found it interesting that his primary workout partners are BC guys - the Hayes brothers, Bill Arnold and Noah Hanafin. Appears to have zero affiliation with BU hockey whatsoever.