One thing they are doing right is to be in London. When they scour the world for top talent, just their location attracts plenty.I just had a look at their recent academy products and their performances this season -
Livramento - 18 yr old RB for Southampton, has been brilliant
Billy Gilmour - 20 yr old CM for Norwich, has been very good
Armando Broja - 20 yrd old striker for Southampton, only sub appearances, but Soton fans have been impressed with him
Hudson-Odoi - 20 yr old, in Chelsea's first team
Conor Gallagher - 21 yr old CM for Palace, has been brilliant
Lamptey - 20 yr old RB for Brighton, has been really good when fit (seems to be injured a lot though)
Marc Guehi - 21 yr old CB for Palace, has been really good
Mason Mount - 22 yr old CM, in Chelsea's first team, incredible player
Reece James - 21 yr old RB, in Chelsea's first team, incredible player
Trevoh Chalobah - 22 yr old CB, in Chelea's first team, has been really good
Tammy Abraham - 23 yr old striker for Roma, has been brilliant
Tomori - 23 yr old CB for Milan, has been good
Jamal Musiala - 18 yr old AM for Bayern, has been their star player this season
I'm not even counting the "promising talents" that are yet to make the grade, just listing the players that are doing incredibly well at their current clubs.
They seem to be doing something right with their academy because that is a pretty big list of fantastic players, all of whom are playing in top leagues like PL, Serie A or Bundesliga.