Totally agree but for what you saw from Lamine yamal (preseason, end of last season, international match for youth), what's you opinion? Would'nt you say he looks pretty promising?
He looked promising, but...
Regarding very young players, aged 17-18, there are always a few elements which are boosting their performances and perception about them:
1. youngsters usually give 200% in the first few matches. That is not their regular level, this is way above their average performances
2. in friendlies or cup matches, older players slack. And when they play at 50% and youngsters play at 150%, it may seem that youngsters are way better than they actually are
3. with youngsters, even if they are good, the opponents don't know them and don't rate them yet. So, even if a youngster is a one trick pony, he is able to execute his trick in the early matches because no one is aware of his tricks.
Once when he becomes a starter, things are getting harder because the opponents are marking and fouling him way more seriously
4. Regarding fans, when the new kid emerges, all good areas of his game are multiplied by 200-300%, and all the negatives are shrugged off like: he is young, he will learn and improve, leave the kid alone.
So, it is a win-win for kids. Whatever they do, fans see only the good things.
Only 2-3 years later, when the kids start to play at 80-100% level and lose that crazy boost from the early months when they play at 150%, people start to spot their flaws and real level.
Check today how the opinion is changing about Gavi and Pedri.
5. also, these kids usually play in the 2nd half, when the older players are tired.
While kids play at 150%, so it can again skew the perception.
So, we have seen some promising signs but we'll need to see kids:
1. when they play from the minute 1
2. after a few months when they won't play at 150% anymore
3. and when the opponents will figure out their main tricks and movement