Because they have a few teams between them and 9th, they currently have some cushion. Not lots of points but some - several teams would have to pass them.
If Jones, Matthews, Marner, Nylander, Rielly or Tavares - a significant player goes on LTIR, there's a good chance that cushion is gone because it is not a big cushion. I realize they've played well without Matthews before but I wouldn't want to bet on that continuing - particularly this year, where they have relied more on his offense to keep games close. They have not scored many more goals than they have allowed.
If last night's game was a response by a team that feels badly and some responsibility for what happened to Samsonov, that could be a good thing if they stick with it. They have no chance of accomplishing anything special playing defensively the way they were before last night.
The fact that we're even having a conversation like this ought to give some indication of how much more they have to accomplish in order to have a good chance at winning a Cup.