Aside from Kase, there weren't any significant injuries on our side coming into and throughout the playoffs - rarely is a roster this healthy and probably one of the best Leafs lineups we're going to see during the big-4 era.
With this said, I still find it weird how there isn't a bigger magnifying glass on Keefe's decisions. I know I'm focusing on depth defensemen with this but the failure to ice the best lineup and opting to go with safer options did more harm than good. I'm making value judgements here but I'd argue that both Sandin and Liljegren were poised to make their marks... instead we saw guys like Holl and Lybushkin try and fail to move the puck and make a play when we were trying our best to score. Giordano saw time on the PP, Sandin's strong suit. Gio's also developed great chemistry with Liljegren which would have better balanced the pairings and cemented them as viable offensive threats.
With that said, games, and ultimately series, are decided by special teams. One team got 5v3s and made the most of them, the other team couldn't capitalize on their better 5v5 play to offset those ill-timed penalties. That trip on Nylander in the final game should have been called and identical interference incidents were called in two significantly different ways.
They played like trash at the start of games 6 and 7. Campbell was out-duelling Vasilevskiy in large portions of the series, imo