Yup. I've commented a few times in different threads that we ignore human psychology way too often when we are discussing players and coaches. Not only to large organizations use personality tests to identify personalty sub-types, top level executives also work with leadership consultants/coaches to help them identify their own personality traits and the personality traits of others to help maximize their working relationship with their direct reports (middle managers/supervisors).
I have no doubt that at least some NHL/and other level coaches work with leadership consultants/coaches in the same way to help maximize the play of their teams and individual players, and this is most important with the youngest players that have yet to establish themselves. IMO one of Maurice's strongest qualities is how he pulls all the right string with his players. He is the "Alpha dog" and a very strong leader, but at the same time has developed unique relationships with each of his players helping to maximize their play based on the personalities of each player.
First and foremost hockey teams are a collection of human beings, made up of very strong personalities in an extremely stressful environment where you can be promoted or demoted based on a single poor performance. And while someone else's success may benefit the team it my mean your personal failure. Managing young kids coming into this environment is not an easy thing to do. Some will thrive, some won't.