I respectfully disagree that the Center position will be the weak spot on this unit. And I will be shocked to see another "rookie" get the nod at the starting job. Rhaney is a longshot to start.
That Barnes and Jones haven't shown "us" anything is of little consequence to me. They have both been here long enough to have shown the coaching staff enough, obviously to feel confident enough to NOT to go outside the organization for their replacement. Jones has only shown that he cannot stay on the field. Barnes has shown that he understands what it takes to be an NFL lineman. IMO, he is the protoype of the guy who has developed into a NFL caliber starter.