If you are thinking Farniok, I would agree that he is a better option than Hoffman, but something tells me he left on bad terms and is not coming back. IMO, considering what they had on their roster, they should have made a spot for him on the 53. I would feel a lot better about the OL today if Farniok was playing than I do about Hoffman.
The Cowboys mistake was not ensuring they had a decent backup at Center even if they wanted to let Farniok go. But consider this, if they wanted to sign a quality backup at C, then they would have to make a spot for him on the 53 man roster. They obviously did not want to do that which is why they cut Farniok in the first place.