to bring out the youth player potential, if the youth player don't have preffered move give i preffered moved from the player in senior squad. for example, choose torres to tutoring the youth player for giving prefferd move. after the youth player have prefferd moved, and he have a bad mentality, make someone to tutor him from aproach to the game (the player must have better mentality and better influence).
if the youth player have all of them above, just loan it, to affiliated club if there's no one club wants to loan him.
just give it a try, i've tried it, and success... | 
