it doesnt matter where they play or how, pogba is already miles ahead of marchisio and definitely more key to this team. If marchisio goes down today for the rest of the season we can easily replace him, on the other hand a monster like pogba is a freak of nature and is irreplaceable 1-1, youd have to get 2-3 players to compensate for he brings. It's really laughable tbh to bring up marchisio in the same sentence as pogba, the same happened with vidal when he first joined and it thankfully ended, same should happen here.