http://www.si.com/nhl/2016/06/30/nashvi ... e-warriors
The problem with the Preds was their starting lineup, the one they went to before they went "small." The weak link was Weber.
While the B-Unit had the right personnel to realize Laviolette’s exciting vision for how hockey should be played, Roman Josi, Ryan Johansen, and Filip Forsberg suffered from Weber’s misadventures at getting the puck out of Nashville’s end. The first step to having an exciting offense is ... being on offense. Weber played defense entirely to prevent the other team from scoring (which he did well), not to quickly convert defense into offense. This strategy hurts at both ends, however, as prolonged shifts in the defensive zone—even well-defended ones—eventually lead to more goals against and fewer opportunities to score.
That’s why trading for P.K. Subban so dramatically transforms the Preds. First, he makes the team much better. I don’t want to belabor the point, but the statistics are pretty cut-and-dry on his being an upgrade over Weber. Secondly, Subban’s ability to rush the puck and play up in the offensive zone allows the Preds to consistently play the style they had employed for only a third of their games.