Here's the thing, winning league titles at that level means nothing. Absolutely nothing. We know this because, how many of our kids have progressed into the 1st team over the last 10 years? Or even gone on to become decent Premier League 1st teamers elsewhere?
Liverpool, City (and other clubs, I might add) have made the decision to go with a strategy of consistency from top to bottom. They want their kids playing the same style as their 1st team, no matter the consequences.
It's not 'just' Klopp or 'just' Pep. That's far too simple an answer. One man alone does not have that level of impact. It's a strategic club decision from top to bottom and it takes bravery to play attractive Football with inferior players, to play out from the back, to keep it on the deck, to resist the urge to hoof it, because you know that you'll get caught out a lot - sometimes you'll look silly. But it's all with the end goal in mind, the bigger picture - to get these lads ready for the 1st team.
When these lads step up to the 1st team for Liverpool and City, it's like a duck to water for the most part. Look at the kids Liverpool played vs Villa in the cup. They got slaughtered 5-0, mostly because of silly mistakes that you'd associate with inexperience and youth, but they had a huge amount of possession, they pressed high. Even when the game was gone, they continued to play the ball out from the back and stick to their principles.
Liverpool and City are trying to ingrain a certain way of playing in their club, and getting it to run throughout the club's various academies. It's the same with Barcelona, Barca B and La Masia, they're training these kids to fit their system. No manager is going to Barcelona now and changing that system. It will be the same with City and Liverpool. When Klopp leaves, when Pep leaves, I bet you a pound to a penny that the clubs will seek to hire similar replacements in terms of style - or perhaps even from within the club. Arteta was obviously being groomed for that role at City before leaving for Arsenal and apparently Liverpool's assistant manager is similarly highly thought of.
Whether Unsworth goes or not, it's important the club recognise the need for consistency throughout the youth teams as well, instead of finding good players and farming them out on loan, where they ultimately get lost in the system.