Why target Shattenkirk when we could target Manson? Similar cap hits so at 50% its maybe 100k difference and Manson the far better defender. Sure we won't get him for Rutta + 3rd but if we are moving assets for a D might as well get the one better at the D part.
I'm not saying we don't eventually find another target, I just can say with a high degree of conviction that Shattenkirk is a target. Last offseason both the Lightning and Shattenkirk had a lot of interest in him returning but the #'s just didn't work. At 2 million I think they do. Anaheim is just a great team to broker a trade with in general if we need to dump cap space.
I don't think we need an amazing defender, I just think a high end offensive RD who can keep his head above water could help a ton. Last year it should have been obvious what we've been missing from a PMD like Shattenkirk, who can generate a ton of offense from that spot. If Rutta was a shut down defender, I still think we'd be interested in Shattenkirk, it's just that Rutta hasn't been consistent enough offensively to justify his average defensive game.