The defense is more confusing...
The talent is clearly Chara, Krug, McAvoy and Carlo, but you can't have a 3rd pair of Kevan and McQuaid.
If they envisioned McQuaid staying with Krug then why expose him and not Kevan Miller?
If Kevan Miller is expected to be in the top4, then you're asking McQuaid to play his off-side in the 3rd pair, which he's never done.
Again, the decision to protect Kevan confounds me. If 54/86 were both exposed you'd likely be rid of one of them. Not that I dislike either individually, but as we all know they're redundant. Do they think they can trade one?
And just like with LW's, it seems silly to me to sign a quality UFA to be your 3rd pair LD. That would be tying up cap space for a spot that has Gryz, O'Gara, Johansson, Lauzon, Zboril, Lindgren and Sherman all waiting in the wings. To say nothing of Vaakaneinen, who also has legitimate pro experience.
The idea of signing Shattenkirk and then dealing Carlo makes more sense to me than signing a Del Zotto or Kulikov and calling that your defense. But doing that would require some creative and aggressive trading and our GM hasn't, as of yet, shown that to be a strength. So that play seems like a long shot.