I was telling some friends the other day that Vrabel would be perfect in Cincy for the exact reasons you just stated. Let Burrow help pick an OC that has a similar philosophy and let them cook up the offense, while Vrabel flips the defense.
The last true "hack" the NFL has that isn't IMO being utilized enough or maybe at all, is paying coaches/coordinators well. Everyone likes to talk about how you can't hire a defensive minded HC anymore because they'll lose any competent OC to a HC gig. I call BS. I think that forward thinking front offices will and should start to pay their coordinators and asst coaches enough to keep them in place and successful. There is no salary cap for coaches. As a Vikes fan, I'd love to see them offer Flores enough money to turn down a mediocre HC job. It won't work for every situation, but I think that if you have everyone on the same page and there is mutual respect and good working relationships it would work. Egos need to be set aside, for sure. Like I said, this is something that won't work for everyone, like the panthers, the jags, jets, etc., but for a solid stable organization, I think it would. Think Steelers, Chiefs, 9ers, Vikes, GB, DET.