There's no reason to think Faneca would actually move to Center; it just an option that was explored in the article but the team has never given any indication that they were headed in that direction. Let's not forget this is the guy who up until last year when the whole team stunk; actually earned every one of those pro bowl trips and everybody was singing his praises as one of the best OL in Steelers history, etc. I don't believe he suddenly started sucking but I do think his contract status this year has affected his play. At this point if they were able to resign him for a reasonable amount I would say keep him and but still draft an OG this year to take his place and be ready to go in the next couple years.
Mahan needs to go, he's worthless..draft a Center that we can have around here for as long as we had Webster, Dawson, or Hartings.
Simmons, the jury is still out; I think he's production is directly affected by the lack of production from the players on his right and left. They get overpowered and then he's left getting overpowered as well. He's got a big deal so he'll be back next year.
Colon, I think the Jury is still out on him as well but like BG32 has said before he may be better suited at Guard. Either way I still think that Tomlin needs to hold an open competition at Tackle next year on both ends of the line. On that note as far as Starks goes I think he will probably come back; I don't know how good he's going to be but I think he's got potential if they can just make up their mind where they are going to put him and leave him there. It wouldn't surprise me to see him not come back next year though because as Koopa mentioned we could use serious injection of Youth and dominance on the line this year.
Marvel, we have to wait and see how his back goes this offseason but still he is getting older and a dominant LT should be drafted. Again this depends on if they think Starks can take over at LT. Right now there are a lot of questions surrounding the line but if nothing else please draft a Center and then let's see how things shake out.