Everything is in place for ten Hag to succeed at United, as far as structure goes imo. We have strong structural support for the next man in, and unless the board undermine the recruitment department by giving control to the Manager, like we saw with Solskjaer, who was allowed his own personal scout, Simon Wells. Then your recruitment won't be as thorough, because you then have two factions within the club working to recruit players with the bigger faction (club's recruitment department) being undermined by the Manager and his own trusted scout. You give control to the bigger faction who have vast resources at their disposal to help you (head coach) recruit players for a shared goal, towards a particular footballing blueprint.
And as far as Klopp is concerned, it was said by a Liverpool board member at the time they appointed him via the Liverpool press, that Klopp joined Liverpool due to the work that was being done behind the scenes by their recruitment department, headed by Michael Edwards, which really impressed Klopp. And that was at a time when Edwards, had become a laughing stock among Liverpool fans and was even ridiculed by some journos after the sacking of Brendan Rodgers. But subsequently we've learned that Rodgers was allowed to undermine the club's recruitment team and had his own personal scouts, which was allowed by FSG. So Klopp joined Liverpool and understood he had to rely on Edwards and his team to recruit players for his high tempo, fast transition play-style with heavy emphasis on quick incisive vertical passes through the lines. Klopp didn't want to manage the recruitment and was happy in his role as the head coach, which allowed the much maligned Liverpool recruitment department headed by Michael Edwards to succeed and today be regarded as among the very best with UCL and League success.
Two of the key figures in City and Liverpool's success were Michael Edwards and Brian Marwood. And both would've be described on here as inexperienced.