This might be just what the doctor ordered, no pun intended, as such unexpected goalie changes force the team to focus on their details on defense to support him.
I know that Berube is aware that in spite of the Leafs winning, they are not playing the right way enough. They would face a battle if the playoffs started tomorrow (unless their goalies are lights out every period). The bad habits and the poor effort is sneaking in again and they have relied on their goalie to bail them out.
Take last nights game against Dallas. Down 2-1 and they give up a breakaway. If Woll doesn't make the save and it is 3-1, Leafs chances go down significantly as Dallas can tighten up with comfort in a two goal lead. Instead, Leafs strike back quickly and win due to some very fortuitous shooting.