The Steelers have been getting younger (and hopefully healthier). Hampton, Smith, Harrison, Ward, Farrior all were let go in the last year+. They are obviously getting younger, even though it's still necessary to bring back a guy like Foote (who they had no replacement for by the way) for another year.
As for Wallace and Lewis, Wallace wanted QB type money. There's no way he'd fit into the Steelers salary structure; Miami is going to regret that contract, just you watch. And Lewis, well, let's see what happens first. He hasn't gone anywhere yet. And Mendenhall, you're complaining that they let Mendenhall go? Seriously?
And who is James Harrison's replacement? Jason Worilds? lol.