I can't agree fully since he showed a very high level at Hoffenheim even before he went to Leipzig. And Hoffenheim doesn't as good a setup Leipzig, so he can operate independent of setup. Maybe he's a bit overhyped, but I don't think it's for that reason.
But more importantly, which kind of coach do you think is the right fit for us?
Hoffenheim qualification for CL is the best of the underwhelming rest in Bundesliga that year. They qualified with 55 points. That's incredibly low but also shows the state of some of the midtable clubs in Germany...and the next year in CL, Nagelsmann's Hoffenheim finished last in their group. He never had the chance to back up his 'success' at Hoffenheim.
Ole is the right fit for United right now. He knows the type of player and quality needed at United. He also knows the mentality needed. He can infuse the squad with the requisite talent and character. It's still lacking in consistency and quality depth. Continuity (Ole) and consistency go hand in hand.
United need one forward to step in for Greenwood and or Rashford from time to time or at least challenge Rashford. Mason cannot start every match. Martial needs cover but he's the most improved player by far and if he can remain consistent at this current level or even be better...that would be scary. Also need at least one central midfielder who can cover for Bruno and/or Pogba. Need a 3rd CB who can spell Maguire and Lindelof who then pushes Bailly to 4th choice while Tuanzebe or Mengi gain experience. All while Williams, AWB, McTominay, James, and Greenwood all must improve and be more consistent.
I'd rather continue to see Ole groom these players and potentially new talented players for another couple years and then assess his future. By then, the team will be theoretically at it's optimal. Front 3, Bruno, Pogba, Matic replacement or McTominay/Fred, the back 4, and probably Henderson or new GK.