A lot of the grief that McCarthy gets on here is due to his pretty average ( at best ) form in the last two seasons.
What people overlook is for those two seasons we had strikers and wingers pretty much under instruction to limit their tracking back so, for a lot of time, McCarthy was pressing on his own, which is almost always doomed to failure.
In his first season, Pienaar was around snapping at peoples heels, so McCarthy was less isolated.
If he was playing alongside Barry now, he'd be getting a lot more help from the likes of Barkley and Mirallas so he'd almost certainly look better than he has for a while.
If Gana gets injured or his form drops then it'd be interesting to see McCarthy given a run in the team.