I agree the full backs are key in our game and any possession based game where you compress the defence into their own half or defensive thrd. You need a way to get behind them and the full backs are critical to this.
While our full backs do press forward they do so without full control of the midfield. How many times have we seen the ball lost in the middle of the park and the opposition exploit the space left by our full backs who are out of position?
To their credit seldom do you see United lose possesion and the full backs out of position. The platform is there for them.
I also agree that we've had a cavern up front without a finisher. We've taken some steps forward there but I still think the midfield is a problem. I'm also sure that Rodgers is aware of it with his constant search for teh right balance in there. Sahin hasn't convinced and gone, Allen is under pressure, Gerrard is playing deeper, Henderson is getting game time . To me it all points to Rodgers searching for something.