I think the focus on North South is a bit excessive. You have to be adaptive, hardworking, and smart overall.
I remember when we were a straight line team and painfully predictable. A shot on goal from a north south rush that was easy for the goalie to see and block. The rebound was cleared and the offensive play was finished. We begged for more cross ice passes to open up the goalie, more movement for screen opportunities, more chaos.
I'm not buying the sentiment that there is one way to do it. The problem was this team didn't work together. Quinn battling the effective lines to change, but never doing a damn thing about the bad effort or discipline from them. Constantly punishing the kids for making honest mistakes while listening to his demands. Get good leadership and buy in to being a team.