This is going to be another battle between easily stoppable force against easily movable object with the Cards' D-line against the Bears O-line. If the possible line of Borom-Pryor-Shelton-Davis-Wright can keep pressure off Williams, he'll probably look like he did against the Panthers and Jaguars.
If you want an example of perception of QBs behind a good O-line compared to a bad one, you only have to look as far as Stroud last year compared to this.
On the lunacy of having your backup Center full back carry the ball last game, maybe the explanation that they can do different trick things out of that position would have worked, had it not been for the fact that having Johnson carry the ball behind Kramer has been goddamned automatic.