This is why I said a few times, ten Hag will only be a success if working in tandem with Rangnick.
Rangnick has built a club up from the bottom to top in the modern era, he knows how things should be behind the scenes. Relying solely on Murtough whilst having Rangnick only as a consultant will be a massive mistake, Rangnick should be given a permanent role.
Murtough saying he'll lean on the expertise of Rangnick is him basically saying he'll learn on the job, which isn't good enough, in fact Murtough should be the Deputy DoF with Rangnick being DoF. We're now in the position where we need experts in their correct roles, none of this learning on the job shit, that's how we've landed in this giant rut.