you are right there but thas because hes beast, hes played for lyon when he was 19 but he wasnt no good, until he went to marsei when he was 20, os techancly we can say marseille has the best coaching
He played 62 games for Lyon and fell out with the Manager/coaches hence him leaving. A host of top European clubs were after him including Real Madrid and Arsenal, they wouldn't be after him if he 'wasnt no good'.
BTW you still haven't named any other players other than Nasri, struggling to think of any?