Sure the Steelers signed Okobi last year but they were also stupid for passing up on Mangold who was regarded as one of the best Centers to come out the draft in many years and who was already being penciled in as a starter and Pro Bowler for whatever team drafted him. Okobi has been with the Steelers for 7 years now and we still don't know how he'll play as a starter.
I'll agree that Holmes should have never been returning punts and that experiment should have ended long before it did but to suggest that he would have been more of an upgrade over Mangold is sheer lunacy. Holmes started to shine towards the end of the season last year but when it's all said and done Mangold will be going to Hawaii many more times than Santonio will.
BTW-I'll bet you a case of beer Kalil makes the Pro-bowl before our second round pick Woodley does??