If you ask me and we will only see more of this , we have been sussed out now, teams know that if they defend deep we just dont know how to break through. Wouldnt be surprised to see Utd do it again at the weekend. Teams know that our defence is errorprone and is almost guaranteed to give you a clear chance, so the straight forward way to deal with Liverpool is defend deep, wait for the inevitable defence cockup and hope that you are in the right place when it happens.
Also, we seem a bit Arsenal-esque at times, taking too many touches as we attack when its not needed