I reckon I´ve seen close to, if not all his games in the first team, a lot of them at the stadium, and to be honest it just sounds like you have made up a description there.
He absolutely still is potential, even at 24. He is not a dribbler in any way, and while I think he could be a consistent passer along the lines of Busquets to keep the team moving, he has shown absolutely nothing to say he is a "fantastic" passer. Keeps it simple, doesn´t take risks and that´s either precisely his instructions or more likely he is lacking the personality to really grab his chance.
I like him though. He does all the basics very well, and is a very good tackler and like McCarthy seems to naturally know where to be when there is a threat to the defence but he doesn´t ever seem to do enough to really notice his presence. However....that´s a big ask for a young player of that type at Barças level.
I would love him to make it here, but if it´s not to be it would be amazing to see him at Everton. Having said that.....I don´t see the need for him so it´s a probably a load of rubbish.