It's hilarious how many people, who have zero idea about these coaches or even what their responsibilities are going to be, are already crapping on the move. I am not a Cassidy fan, particularly as a head coach, but was told by a couple of hockey people as far back as two years ago that Cassidy would make a great NHL Asst coach because he's got a great hockey mind. The NFL landscape is littered with guys who are great assistant coaches, but could never hack it as a HC. Different sport, but I'm going to assume that the same holds true for hockey.
As usual, I will wait to see how things actually play out before prematurely condemning the move. Not a popular stance it seems? Also, I don't get to say I told you so at some later date, but I think I can live with that.