^ That mismatch in styles may also explain some of the difficulties in this transition. We didn't have stellar depth before the change and then we had to move in a different direction, while trying to straddle the two styles with TA as QB for two seasons. You talk about 'identity'; I think the Riley and Langs imprint on this offense will eventually come into its own. It doesn't have to be rigid but it will get more cohesive.
I've heard the theory that one or the other style is "easier" to get in the Midwest. I don't think that's necessarily true. Effective OL play isn't that easy to get, period, and neither are talented OL. You need both whatever style of play you pursue. We had several years trying it one way. It was fun, it was entertaining, but I like this "New England's OL right now" sort of style, personally.
O-lines take time. Wisconsin has been running the same style of line since Alverez got to Madison 25 years ago. Iowa has been running the same system since 1999. Nebraska ran the same basic system from 1962 till 2002. Since then it has changed line systems basically 4x.
All the injuries really hurt the O-line development last year. One game last year, I think it was Indiana, they started 3 former walk ons on the O-line because of injury. The line will be fine if they stay healthy. The line may actually benifit from a QB that actually will step up into a pocket. I am not saying they are going to be this dominant line, but I think they will be very serviceable if not a good line.