Agree, it should be something that can be done and it has been. The difference in having a guy that has experience at the OC position like Shannahan did with CMC last year and a neophyte OC that is trying to learn OTJ on a team with Super Bowl aspersions.
That's the main reason I never liked the Dorsey hire. If you're going with a defensive HC, the offense needs experience at OC. Dorsey deserved a chance IMO, but not here.