I think that Claude is really good at using Krug's strengths and hiding his weaknesses, and given that, he's in exactly the place on the team he needs to be. He's a 3rd pairing defenseman that Claude can give offensive-zone starts and who can quarterback the power play and make good passes/shots from the blue line. I'm very happy with him in that role and I think Krug can shine there. The bruins do have 8 D-men under contact next year, and I think that Chara/Seidenberg/Krug/Hamilton are the only untouchables. I think Boychuck, McQuaid, Miller, and Bartkowski are all moveable, even if only for a mid-round pick. I honestly think one of Boychuck/McQuaid will go, Boychuck more likely because his salary cap relief will be bigger. I think that a starting 6 of Chara-Dougie, Seidenberg-Miller, McQuaid-Krug is very competitive and will give the B's a little bit more relief to go out and deal with the RFA contracts to Smith and Krug, re-sign Iginla, and replace Thornton and Johnson.
I'd love to see if Kelly and one of McQuaid/Boychuck could be moved, but Kelly has a full NTC. At least Boychuck's NTC clause has expired (was limited for the first 2 years of his deal).