Ferentz is going to be a very solid center. I think the best center we've had in a long, long time. I think Reiff will be one of the better OT's in the Big 10. The rest will be question marks. I think we'll see more roll outs this year and more stretch plays to try and canalize on our OL athleticism.
The center position is going to be perfectly fine. There are two in the running and either could start. Ferentz was in the running to take over the starting job last year, before his incident.
You are right on the OL athleticism, we might have a smaller line this year but they are better athletes. Look for Woody Orne to take over the right tackle position. That kid can run. Plus he's strong as can be, he just broke the Hawkeye record for the hang clean. Gallery's old record. This OL should be fun to watch. Jewel Hampton is going to have one heck of a year!