Interesting, I see him as (right now) the most desirable of the UFAs for a playoff team to acquire. That doesn't necessarily make him the most valuable but if I'm shopping the Sabres, I'd feel more comfortable about Mitchell contributing positively during a playoff run than Stafford or Stewart. But I digress....
I like him, always did going back to San Jose so I have no problem giving him a 2-3 year contract with a nice little salary bump. Ideally he's in the bottom six but I have problems with his play this year with more minutes (of course if you're in the top 6 of this team you're really in a bottom six on an actual team). If they can get something meaningful for him great but I can live if he's not traded and either resigns or goes to UFA.