Pepe LeFrits I don't understand how he didn't develop into one of the GOAT CM contenders.
I think you can sort of see it in Cesc nowadays, really. He's a bit of a fantasist, his mentality's not quite solid. That's one of the reasons he matured so fast, and also why he had such a torrid filial feeling toward Wenger … and also why he had his head turned so far by the destiny of his "Barcelona DNA".
He's got a brain like a supercomputer, but he's weirdly naive with it, and it led to poor career decisions and an inability to fully mature in stature as a leader and winner. Not that he did badly, he's had loads of success.