I think mental toughness is the team's problem not physical toughness. They were leading going into 3rd period of game 7 last year, and didn't even show up for the 1st two games before losing. The year before that against the caps, they lost because of a poor lazy and dumb coverage by their d-man in game 6. Anybody can hit people, but the ones that win have the mental fortitude to make the clutch plays at do-or-die moments. That's what the leafs lack atm, and that'll probably come with experience considering how young and inexperienced the core is. People forget that the majority of the go to guys on that team are 24 or under, and those core guys have played at most 2 playoff series.