True but it appears he was the driving force in putting together the list of 20 desirable attributes for the candidates, plus added to the fact he had previously identified TF as a candidate for the Villa job I think you would have to say that he was probably the main person behind that decision.
I'm all over the pace in how I view Langhe! On the one hand I think he has done a decent job of player identification and recruitment, especially considering he had the Levy-handcuffs on till last September, but on the other he simply has to be held accountable for the TF and Tudor hires, while also taking credit for any future success (or failures) we have under RDZ.
Does he deserve to keep his DoF title and responsibilities or have his limitations been exposed and we should keep him in his corner with his data analysis?
the corporate answer is he needs to go, big/succesful companies do not tolerate failure and that needs to be a clear statement, and yes, often people not completely at fault, or with lots of caveats, get culled in that messaging but that is the way it's done.
he probably won't accept a demotion (e.g. complete title change to chief scout or something like that)
if the club really believes he's great at the "non DoF" stuff, you may just see a shift of duties or other appointments that really take the responsibility.