But look at the teams that originally signed them. This here is the core of the problem. You very rarely see a top flight team invest in very young players, ones that you "hope" will turn into something special. They were all mid-table teams that signed these young guys. That is the "Mid Table Approach". And to be quite honest, if you want to build a fantastic base of talent, that is the way to go.
My mantra when juve came out of Serie B was "Act Mid Table, but think Top Flight". Meaning, they needed to realize that the team was on the cusp of falling apart due to the age of the returning players, and they should have dedicated more funds to signing the young talents, such as the way Napoli, Fiorentina, and Palermo do. It would have taken a few more years to get back to top flight status, but Christ, wouldn't it have been worth it?