I agree with what DD said above but will add that, in Hawks specific terms, there seems to be an overemphasis on trusting the veterans and having a quick trigger with the younger players. Every coach probably double shifts his better players at times but that is usually more out of necessity or desparation whereas the Hawks have a deep roster and are very rarely desparate. I'll use the analogy of Dusty Baker leaving Prior in to throw 120 pitches or whatever even though they had a big lead because he didn't trust anyone in the pen to do the job. The other similarity being the paradox of young players have to earn playing time by performing but are giving very few opportunities to show what they can do. What is irksome about the line blender is that, in a sport like hockey where the action flows, it's important to know where your teammate is likely to be and playing with the same linemates helps that. For example, the other night Kane threw the puck blindly toward the net expecting (or hoping) that one of his linemates would be there to finish. Someone that has played a lot with Kane (like Toews) anticipates that. Someone that hasn't (like Shaw) isn't going to learn that immediately.