I think it says more about Saffold than Barksdale, I don't doubt the Rams are worried on if he can stay healthy or not. Remember this guy didn't sign with the Raiders because he couldn't pass a physical, he's still a question mark, and it kept him from getting his OT money and forced him to guard when he lost out his job.
I think we'll be seeing more of Barksdale at tackle than guard anyways.