I think Kevin Klein was traded because they had Shea Weber as the top righty guy, had just drafted Seth Jones who they saw as the second righty guy, and figured why pay Kevin Klein to sit on the 3rd pair for the next however many years when they could potentially flip him and get a top 4 left handed guy to go with Josi, Weber and Jones. Unfortunately the gamble for them didnt pay off but the rationale was there.
I'm happy he's having succes and he has saved us a couple of times already this year, but if he stays on this pace and scores over 20 I'll post a video of myself jumping into the east river wearing nothing but his jersey.