He is already 19 and was a substitute last year (at least in Nextgen games) so I couldn't watch a single game of him, I don't think that a guy who is a substitute of an average player like Calvé will make it to the first team.
But your right. Pol Calvet and Babunski are good Barca B players, but not enough for the first team. Sergi Samper only midfielder in Barca B with the potential to become a regular first team player.