I don't have much I disagree with in your post except... the belief and optimism (read faith) you have in us being able to see such things through succinctly without [outside] assistance, or more specifically, with the football people being left to develop the footballing side of things how they see fit, which is where I mention impedance, particularly when push comes to shove and the things someone like ten Hag wants need to be enacted.According to De Telegraaf , when Spurs interviewed ETH in the summer and asked him who he would bring, he said he would bring only one person, we don't know who he would bring with if he comes here.
So far, only Phelan was renewed, if Ole goes he goes too. As for Carrick & McKenna, they are yet to renew, Ramsey is young and probably not on big money so he can be let go without any issues, as for the bolded part, except for Phelan the other 3 don't have quarter the experience of ETH so I bet they would be happy with any role they are assigned, and I think they would be ok if they worked under some who has solid experience like ETH, not saying ETH is as good as Pep, Klopp, Tuchel, or even Poch, he still has to prove himself.
You are 100% right, and I think (or more likely hope) that people like Murtough, Bout, Lawler, and other experienced football people can work together with ETH, that is the purpose of a structure in football club, which is to provide support to the head coach in various aspects, but a football structure can't coach a football team to win football matches, that's the head coach's job and that is what we need now.
We have to start somewhere, and we did in 2020 when a football structure was set up then, and yes it's a new structure, but it's one that has clear roles and responsibilities, we can't just take Ajax's CEO, DoF and Head Coach, but what the club can do is have a proper structure in place, just like City & Liverpool did before they got Pep & Klopp, and again I must stress that I don't think ETH is our Pep or Klopp (he could be but we don't know that yet), but what's obvious is we don't have a competent head coach, and that needs to change.
There's nothing to dispute in your last paragraph, either, and at a functional club, it's elementary stuff, which is again where I will believe it when I see it when it comes to us.