Just the law of averages says either Gross or Kalil (or both) will go down this year. We're not prepared for that. Hangartner can play center better than he can play RG, but he's no Kalil by any means. Kalil manhandles everyone within arm's reach. Hangartner doesn't.
Wharton was dependable enough to step into the LT spot. But if one or both guard positions get shaken up, I don't think our depth is good enough to mask a rookie who doesn't pan out.
Hopefully I'm wrong on everything.
I think that most Offensive Lines are in the same situation. Most are not equipped to handle the loss of All Pro's at these critical positions.