Does anyone want to discuss Chelsea's acquisition of young talent? Is anyone concerned?

It seems there's been a shift and the type of player that Chelsea is signing. The last dozen or so years had us signing proven, first team ready superstars. The last few transfer windows have shown a shift a from that thinking.

We now have a manager that has a proven track record for developing young talent. We also have a transfer strategy that sees us acquiring young talent. Does this mean that the next few years will see Chelsea finishing out of the top five while these players are learning the game under Pochettino?