This team can not score in transition, when was the last time they scored off the rush.
Pacioretty used to score off the rush, and get breakaways all the time. It doesn't happen now. If you don't think switching Subban (who had more assists on Pacioretty goals than any other player, including forwards)... for Weber (who has done near nothing 5v5) makes a difference there, I don't know what to say.
Its not just Pacioretty though, Galchenyuk scored a bunch off the rush. So did Gallagher, and Plekanec, and others too. But the pairing who plays the biggest minutes for the team has no puck moving and transition.