Bruce Boudreau is a shuffler of lines. If a player is playing well, he gets moved up. Or put on a line that is struggling to get going. Or if a player is struggling, Boudreau will stick him with some of the best players to get him going. Despite all the line shuffling, Boudreau has (mostly) kept focused on some core pairs and made it work around them. Staal and Zucker anchor the top line and Parise and Koivu the second, everyone else fills in around them.
Bruce Boudreau is a great coach and I naturally assume he knows best.