Nothing you've written relates to being able to:
- To find their team mates with ball
- Press with coordination
- Develop repeatable patterns of play to create chances.
Something each of the Coaches I mentioned have done in the Premier League well within 15 months of taking over with squads comprising mostly of players they didn't sign. The fact that Emery was sacked despite doing so is testament to the fact that it's not really all that high of a bar. It's the bare minimum expected of a Manager.
Yes, Pep had Txiki. Klopp had Edwards. But the Sporting Directors are not the cause of their teams being well-coached. Strangely enough, that's primarily to do with... the Head Coach.
I know that ETH played some lovely football with Ajax, I saw it with my own eyes when I visited Amsterdam. That's pretty irrelevant if he can't reproduce it in a far tougher league with a different set of players.
I'm not saying that football structures are unimportant. They obviously are. But consider the following questions:
- Are United playing like a well-coached side?
- Have any players been markedly improved by ETH?
- Is ETH getting the best out of any of his players?
If the answers to some or all of those questions is no, it really doesn't matter who's supporting the Manager as he's failing in the core competencies of his role.