Klopp is one of the best managers/coaches to bring young players through and develop them, so I would not judge them yet.
They are very raw, under Klopp and playing with the first team they will develop, the likes of Elliot, Carvalho, Kaide Gordon, and Jones are tremendous prospects, we will see how many make it at the top level, but I think it was good management/recruitment bringing them in at a young age, so you can see where we are heading.
When Klopp joined Liverpool, the press were always asking will he buy star players he has managed before like Aubameyang, Lewandowski, Götze or Reuss etc, his answer was always he wants to get the next Aubameyang, Lewandowski, Götze or Reuss and develop them to his system, that is what he is doing now.