It's actually true though. If you remember the Sampdoria game, we had some defensive problems down our left side, which mainly was due to Pogba not closing down spaces like Marchisio is usually doing. This also resulted in Vidal having to take over more defensive duties and not being as noticeable for most parts of the match. This should of course in NO WAY diminish Pogbas talent and ability, and he partially made up for it with his attacking play, it's just one of the parts of Marchisios game which more or less only gets noticed once it's missing.