Mitchell has never been in a role where he's excelled at overseeing multiple departments on the football side of the club. When Mitchell was at Soton, it was Les Reed who was overseeing the football side at the club. At Spurs he was under Pochettino in a manager led approach and worked as the head of recruitment, similar to his role at Soton under Reed. At Leipzig he worked under Rangnick in the very same role as what he occupied at Soton and Spurs. And currently at Monaco where he's the guy that is tasked with being the DoF, he hasn't done very well and Monaco fans aren't happy with him.Not asking their role. Asking are they more qualified to oversee recruitment than Mitchell/Rangnick? I think we all know the answer to that.
Ralf Rangnick did a decent job at Hoffenheim and the Red Bull clubs. But without those clubs being financially doped up by the very wealthy owners (Dietmar Hopp/Dietrich Mateschitz), they wouldn't have achieved anything. Rangnick was a head coach for most of his career and only became a DoF due to the rise of the financially doped up clubs.