My thoughts on Sheahan are that he's a 3.5ish Center... A good 4C/PK option and a mediocre 3C option. Everything that a stereotypical bottom 6 C has... Good faceoffs, good PKer, mediocre across the board in everything else.
I'm not in favor of "upgrading" Sheahan, I'd like to acquire a true 3C and push Sheahan down to 4C. I understand that paying a 4C almost $2,000,000 is not ideal, but I think if we could get that true 3C then pushing Sheahan to 4C could be the depth piece that helps us take that next step. And with Sheahan coming into RFA-status next season, we wouldn't be hand-cuffed with the spending there.