Cleverley will get the best out of Barkley, he passes it quickly - does give and goes. McCarthy and Barry do not do that, Barry is playing the defensive role the best at the moment, for me McCarthy has been poor and I'm a big fan of his.
Watch how good Barkley was with cleverley in the side, his style of play works well for Ross. Some players need that certain player to get the best out of them, doesn't need to be spectacular like Kone for Rom, like Jags for Stones.
For some reason because Ross is the latest and best scouse midfield talent since Stevie G, people expect him to be an evolved version of him - he is totally different. They share the same ability to shoot from distance and the ability to ping a pass, Gerrards mentality was on a different level and Ross will take time to mature.