The Bruins weren't the only team that they needed to get past. The Bruins got thoroughly waxed by the Panthers in the next round.
The Leafs' ultimate goal is to win a Championship. And my argument is that they'll need depth to get there.
You said the issue was defense and goaltending when that hasn't been an issue for years. The Leafs lost because they couldn't score more than 2 goals a game. End of discussion. Had nothing to do with what you said. 4% PP.
If you even watched the series, the Leafs were absolutely lights out defensively. Suffocated the Bruins especially end of the series. Held them to 1 shot in back to back elimination games in the first period. Lost game 7 by 1 goal in OT.
There is not a team out there who is winning the cup winning every game 2-1 no matter how elite they are defensively. Sure they need to be able to win some games that way (and the Leafs do as well), but not every single game. The margin for error is too thin.
Leafs failure is having 50% of the cap being in offensive talent and the past several seasons the offense has been the weak link. The myth the Leafs just get blown out and can't outscore their problems is tired and I am burnt out on having the debate with people who don't even watch the team evidently.