I've no idea. I couldn't tell you about the development of individual players. However, it appears to me that England and Wales currently have younger squads than has generally been the case throughout my 45 years following football, and most of the players in those squads also appear more comfortable with a football at their feet than has generally been the case.
Regardless, the main issue (for me at least) is that City currently have a manager who is seemingly opposed to the idea that young players should 'pass, pass, pass' and that philosophy manifests itself very clearly when his team plays.