I have sparingly made comments on Sheahan so far in his time in Pittsburgh. I pumped him up before he came in here, I haven't focused much time on him since he came in. Mainly because he has been unnoticeable in most of his games (not meaning that in a bad way, defensive guys not being noticeable is a good thing). People may think that I pump up Sheahan because I disagree with claims like "Sheahan is an average to good 4C". How could you say that Sheahan is just an average 4C? There aren't 15 teams with better 4th line centers than Sheahan. Sheahan is ideally on your 4th line because it means you have a really damn good 3rd line center if Sheahan is your 4th line center, not because Sheahan is only an "average 4C". I don't go into PGT after games where Sheahan plays terribly and say "Sheahan is good, you guys really gotta chill with saying that he is bad", which is exactly what WC did in this thread.
I'll reiterate it again, the Penguins having Cullen for the last 2 years has completely thrown the idea for what a bottom-6 center should be out of wack on here. Sheahan is a lower end 3rd line center playing well on a line that is working right now. I don't know why people are complaining about him. He's a little bit worse version of Sutter. That may not be good enough for the kind of 3C you personally want, but it is a 3rd line caliber player. Seeing how the names thrown around for the 3C spot here are guys like Duchene, RNH, Staal and Draisaitl (legitimately saw someone suggest this a couple days ago), I'm thinking this site doesn't have an accurate idea for what an actual 3rd line center is.
Edit: if the Penguins can add a better offensive bottom-6 center and slide Sheahan to the 4th line, I'd be completely happy with that move. I'd also be happy to add a center like Letestu to that 4th line and inject some offensive skill into that line. The Penguins need an additional skilled bottom-6 center regardless of whether Sheahan pans out as a 3C or not.