Agree almost entirely with Sundstrom on the facet of it all and the chore for Shero.
Top pairing of defense has to be figured out. Lovejoy is a 3rd pair who played top pairing minutes and situations. Greene is on the decline, needs to be sheltered more and should no longer see any serious PP time. Shattenkirk and a LD would do wonders for this team.
In terms of F, they ideally need two replacement forwards for the Top 9. I think they can fill the 4th line with Noesen, Wood, and maybe a Speers or a veteran C. But they need another winger who can skate and shoot.