The biggest problem with the Barry/ McCarthy thing these days is the way we are using them now. Although the personnel hasnt changed much since 2 seasons ago, the style has. They were perfect in Martinez' first season, because they mainly stayed deep, and would slot back if the full backs bombed on. Meaning the rest of our midfield, Barkley, Mirallas, Deulofeu etc. were free to just bomb on and get on with attacking instead of having to worry about what was going on behind them.
Im not sure whats happened, but Martinez' is just overly cautious now. Okay, I know Baines is injured and Galloway is doing a good job covering, but our full backs just arent getting forward the way they used to, and so Barry and McCarthy are staying central, and we are playing negative wide players like Naismith and Lennon, because they will cover the full backs. I said in the Howard thread that I think this is because he doesnt trust Howard and the defence, so is basically employing more negative wide players, but how many defensive players can we have? No Kone, Deulofeu or Mirallas, and the only players joining in attacks from open play are Lukaku and Barkley, and they are so easily outnumbered. We are trying to play the same system as we did 2 seasons ago, but using it completely differently and it doesnt work. Either change the way we're playing, or go back to using it the same way we did 2 seasons ago.