Man, that third pairing is a huge problem. Rest of the roster looks good even with Bjugstad and Simon out.

I agree with these.

However:
1.) Murray is going to be on the shortest leash of his career this post season. Jarry presents such an interesting skill set with his ability to play the puck to just be kept on the bench.
2.) Now that it's the post season and his iron man streak won't be affected, and if he struggles to get back up to speed or contribute, don't be surprised if Rodrigues takes Marleau out of the line up.
3.) Would not be surprised to see Zucker and Sheary trade places from time to time.

As a second pair yes, as a third pair I think they can get sheltered enough to be fine

If Zucker goes to 1RW, Sheary should be on the third line and Marleau should be with Malkin. No Malkin - Sheary is preferred