The most impressive thing about Pogba is his progress. In the first few matches he was more or less anonymous with an occasional long shot/pass. But the last few matches he really stept up. Tackling, passing, shooting, driblling this game was a showcase for him. Very special player.
But having said that it's downright disrespectful to call him better than Marchisio. He was one of the reasons we won the scudetto last year. He is just a bit out of form.