I'm a big Jake Muzzin fan... but when we signed that contract, I think most on this board would agree that it was likely going to turn sour before it's completion. This isn't TJ Brodie who's success is basically all driven by putting his stick in the right spot. This is a guy who plays physical, and guys like him don't tend to age well.
I fear that with this latest injury; that time may now be here. He's looked off all this year, or at least, looked like he's playing not to get hurt, and 2 concussions in a short period of time are not good. Muzzin is a very important part of this D, and even if he has a timeline for return in the neighborhood of the playoffs, I don't see how you, as a hopeful cup contender, go in knowing you're 1 Jake Muzzin injury away from your bottom 4 being comprised of Dermott, Holl, Sandin, Liljegren and Lyubushkin.
Personally, I'd hope that Dubas seizes this as an opportunity to "Get out of cap hell free" card -- and maybe pursues a defenceman of the quality that he was unable to pursue prior.
In an ideal world, probably 1 with term, and figure out how to move Muzzin in the summer. His full NTC could of course pose some challenges with that.