With the accademy at the best i drawn more than one player LA 5 or 6.
It's not true that you can't draw less than 7.
QFT.
It's all about luck, probabilities and extra investments: you have higher chances to pull quality youth if you search extra youth than just picking 7 players from your basic 8.
What would you get with okay academy? Who knows, an argentinian team pulled a 3/10/3 player with one of those, i never had such luck.
All i would say is that your chances to get quality youth increases every time you improve your academy and i would say that there might be a basic rule:
Sometime ago, a thai manager asked me if it was true that The Best academy grants you PR3 players at minimum, i didn't have an answer for him back then but i started to see how were the best academy youth and i think he were right. I haven't seen a PR2 player from The Best academy for now, all of them are PR3 as minimum, but i wouldn't say that the best academy brings 7/3 players at minimum because i pulled some 5/3 players with it...