Our midfield is not impressive. But it has nothing to do with Marchisio.
I'd say our midfield issues are related to our creativity issues in attack. It goes both ways. We just need a better gameplan. For me, it's on Allegri that he doesn't seem to get a wing play formation going (wingers, not fullbacks), with that material we have. We shouldn't need to play 3 'average' guys in mid. Even if Pjanic, Matuidi and Bentancur are not best of the bests, then we should be able to find a solid balance overall, and dominate everyone outside top 3, maybe even Barca, Real and Bayern. We have so good players in every other position.