It is going to be interesting to see how much the oline can be improved for 2013. Mike Tice worked years on the oline, trying to develop young talent. For the most part, those were wasted years IMHO. If Louis comes back and can play well, then he's probably the only guy who made any significant improvement with Tice's coaching. I believe the oline actually regressed last year. We had a small army of max-protectors having to try and help the oline. It killed our offense.
I say this, not to trash Tice, but to point out that maybe the NEW coaches will need multiple years to develop players taken in the draft (certainly anyone taken AFTER the 1st round, is not a sure-fired solid starter in 2013). We may start them anyway, but that means another nail-biter year with a hit-and-miss offense.
Free agents can help us here, but they are usually way overpriced for what you get. If they truly are great, then their team is probably going to retain them. Yes, there are exceptions to this, but the exceptions are just that - exceptions.
So, where does that leave us for 2013? I do worry about this. I know Emery will bring in some good talent. I just don't know how good the overall offensive line will be this 2013 season.
When I think about these things, I sure get angry with the regime that was just run out of Halas Hall. Jerry Angelo, Lovie Smith & Mike Tice hurt us here. I include Tice because HE was the one crowing about how good the 2012 OL was going to be. That he was "good" with the players he had. It was all a bunch of crap.

