Yamal is the best player in Barcelona and without him Barcelona will be nothing. It was a wonderful display for Yamal as he scored the opening and closing goal for Barcelona. He deserves more because more responsibilities are on his shoulder. I hope that he can play throughout the season without any injury.
Yamal is a very good player and he has huge potentiality to grow up more but now he has yet reached to GOAT level like Messi and Cristiano Ronaldo. He still does not reach to levels of Neymar and Bale when those players at highest points in their career years ago.
Yamal is very important with Barcelona but it's wrong to say without him, Barcelona is nothing. Yamal is not able to score goals or make assists in all matches he plays and this is evidence to counter your saying. I believe that Yamal can perform better than two latest seasons but his career will last long at highest level or not, I don't know and feel very unsure about that. His living style is not good for his career in long term and next two to three seasons will be important for him. As a teenager player, he can have bad professionalism but next two to three seasons, he must mature more and control his actitivities and living style better than now.