Zidane won one league for that stacked Madrid team over five seasons and three leagues in total, being able to play for any team he wanted, with complete freedom and both Juve and Madrid were clearly the best teams of their leagues at that time. Maybe if he could control games more regularly they would've won a bit more...
Pedri needs to be a lot more constructive, helpful and sharp in his movements, I didn't see any improvement in his movements, decisions or involvement under Xavi yet compared to last spring. He still looks too much like a very tired hockey player just standing on his skates and maybe taking a skate once in a while just to keep gliding. He is moving all the time like that, almost always towards the ball in a slow pace, just like when you hold that button when you play FIFA. Most of his passes are just unnecessary movement of the ball, because he arrives too late.
His trajectory towards a world leading player isn't going to be straight I am pretty sure, he needs to change things in his style quite a bit to become a truly dominant midfielder. He does have a lot of tools to become a player like that though, he often surprises me in making some of that stuff I described above work somehow. He has a very nice eye for the final ball, can dribble and hold on to the ball well, often see a trick or unexpected way out of situations, and he also has "long legs" to win some loose balls here and there. I always thought he'd be a good finisher too, I think we'll see him score +10 goals some seasons, depending too on the position he'll play.