I've disliked Reirden since the Carlson to LD thing but I don't really see any blame on him for this season.
It's the roster. We are old and slow. If we flame out, I want GMBM to jettison every non-core player over age 30.
Take a closer look at the roster. Ovi, Backstrom, Oshie, Hag and Kovalchuk are the only players currently over 30. Carlson and Holtby and Eller are exactly 30. Kovi isn't responsible for this season, he's gone anyway. Hags isn't slow, so who is left that is "old and slow" and not a core player? Oshie? He might just be our best competitor on the team.
Ovi and Backie are in fact old and slow, but neither of their games are truly built on speed and of course we aren't dumping them anyway. In the top 6, Kuzy is 27, Wilson is 25, Vrana is 23, they have speed to burn. The entire 4th line is 28 or 29. There isn't a single defenseman on the roster older than 30.
The problem with this team is simply NOT age or speed. Its focus and effort over 60 minutes. They dominate anyone they play for large stretches of most games, but they let down their focus for long enough (usually the whole first period) too often that it costs them.
We can chalk that up to coaching all we want, but if there is ONE thing that is NOT an issue with this team, its GMBM's roster decisions overall.