Let me pre-face this by saying, Leafs lost and deserved to. They had chances to close out the series and didn't show up. Just in case the usual suspects come in with the same nonsense. Compete no-show from the entire team in a game 7, unacceptable.
With that being said
If the Bennett play doesn't happen, or if a penalty/suspension is made against him, it changes the outcome of the series
Although the Leafs didn't show up in games 5 and 7
Game 3 they were the far better team and up early with multiple 2 goal loads, Woll let in some really bad goals
That series could have been 3-0 if Bennett is suspended or if the play isn't made and we have Stolarz in net
It's a huge what if, lots of people on the Leafs board believe it would have been a 3-0 series which changes the way the rest of the series goes completely. At that point they probably win the series and we're having a different discussion today.