Run defense will definitely be worse without B Williams (pass rush won't though, Pierce is more effective there), but we were one of the very best in the league at that. The offense was pathetic and now you're going to let go one of the best RT's? Sure Lewis could replace him, but it'd be a downgrade. And then LG would turn into a downgrade as well. It's a thin OL draft and FA class (especially at OT) and most teams are desperate for OL right now. All of a sudden the offense looks even worse and there's even less help for Flacco. I don't understand how a run stuffing DT could take precedence over one of the best pass blocking OT's in the league, especially when you have good, young and cheap depth at DT and little depth at all on the OL.