This cannot be underscored enough. It just CAN'T.
Tomlin has been the head coach for more than 7 years. The average NFL career is less than 4 years. He has had 7 drafts, with more than 50 draft picks and who knows how many free agents, to make the Steelers his team.
He has done so, with selections like Ziggy Hood, Lawrence Timmons, Jarvis Jones, Marcus Gilbert, Mike Adams, Ryan McBean, Matt Spaeth, Ryan Mundy, Dennis Dixon, Tony Hills, Bruce Davis, Ra'shon Harris, Frank Summers, Joe Burnett, Jason Worilds, Chris Scott, Crezdon Butler, Chris Rainey, David Paulsen, Dri Archer, Landry Jones, Terrance Hawthorne, and zero DB's of any worth. His 1st round successes - Decastro, Pouncey - were picks that were so obvious that even Tomlin could not @#$% them up.
His best players as of January 1, 2007: Ben Roethlisberger, Troy Polamalu, Hines Ward, Heath Miller, Willie Parker, Santonio Holmes, James Farrior, Ike Taylor.
His best players as of January 1, 2014: Ben Roethlisberger, Heath Miller, Antonio Brown, Le'Veon Bell, Ike Taylor, David Decastro, Maurkice Pouncey, Craig Heyward, Troy Polamalu.
The 1st group has 3 likely HOF players.
The 2nd group has 2 remaining from that HOF core, plus two very good skill position players and some good players. No great players. No future HOF players. Just really good and good, to go along with the mediocre.
Look what Noll and Cowher did when they came to the Steelers - they turned over the roster, and added game-changers, future HOF guys. Look what Tomlin has done - relied on the players his predecessor obtained, and filled in with some good players, but no great players.
For both Noll and Cowher, as they replaced the predecessor's players and made the teams their own, the teams got better.
For Tomlin, as he replaces Cowher's players with his own, the team has become worse - much, much, much worse.
Unfortunately, like Captain Smith, I think that Tomlin will go down with the Titanic he has made the Steelers. We have some tough years ahead at this rate.