I'm going to see, now with Nylander back, how the lines look defensively. They really tightened up with Matthews' out which is a sign of the team adjusting to the absence of their top player but with Matthews' they look a bit looser. Nylander back should really boost Matthews line's 5 on 5 play.
Which leads me to believe it's mental rather than system, when the boys need to button down defensively through necessity because we can't just out skill our opponents we do
Unfortunately when we've got everybody in the lineup the boys like to get into track meets and enjoy themselves without sticking to the defensive basics, we can win like that but it's not great for the old defensive metrics