To be honest I've never seen the appeal of Gavi that others do. I remember mentioning this a while back, and surprisingly a few respectable posters disagreed. The rest of the season however, especially towards the end of last season, Gavi was very uninvolved and played in quite a few matches where Barca heavily disappointed.
So far this season he has been much of the same, just kind of there. Running around, pressing, lots of risky tackles but not really a player running into spaces and demanding the ball. He's not a fantastic dribbler or finisher either. I can see if the kid develops into a further well rounded player he can be useful, but I just don't see star or starter material in him from what I've seen last season into this one. Some good moments, but few and far between. Time is on his side though, he's still young.
Pedri has shown a lot more, and is way more promising. Gavi has a lot of work to do, definitely not worthy of that number 6, yet.