Of course there's valid concerns. But we were a great possession team last year. We didn't become poor at it over night, especially considering we went from Brad Richards, a possession graveyard, to Kevin Hayes, a possession monster.
The only difference is, our best shot suppressor, best player at zone exits, and best player at moving through the neutral zone, Ryan McDonagh, just has not been there this year. As they say, everyone starts the playoffs 0-0. He gets to wipe the slate clean. If he does, we're right back in business.
I've been saying all year it comes down to McDonagh. The rest is there.