The difference between Bedard and Celebrini in the NHL is that right now Celebrini has been shooting the puck from better spots than Bedard. Celebrini does a give and go and shakes the Ds cover.
I didn't mention Celebrini lol, but yes, I agree. And although Mack has an elite shot, Bedard's is unreal and still there, he will find a way to fit it and with better teammates he will explode in the coming years. That said, I was only referring to Bedard and Demidov, Demidov doesn't have that level of shooting (he's still good), but he has talent, if not at the same level, very close.