It is not a question of quality, it is a question of trust to give young players game time. Sancho could also play for Everton, but the Bundesliga clubs are giving more game time to young players, so they can develop better. Lookman is a perfect example. The Everton squad is definitely not better than the Everton-squad.
Their are great talents in our squad. Kenny, Lookman, DCL, Davies, Connolly etc. These guys should build a new team and they should develop together, but it is really difficult to realise in the PL, because their is so much money and the club did not have the patience.
For example the Championship-winning team off my favourite club Borussia Dortmund 2011 and 2012. Very young and talented players, many off them transfered from second division, develop together as a team, so they get the opportunity to win 2 league titles, 1 cup and to reach a CL-Final in only three seasons. Because off the money, this would be not possible in England.
Sorry for my bad englsich. I hope you can understand the most importand facts.