All in all, how many of our players in general, let alone our midfielders specifically, do you observe being visibly concerned with and effecting 'defensive balance' and 'cover' when WE have the ball? I see Manquillo do it, Moreno at times, Allen regularly, Lucas practically always when he plays, Henderson infrequently (but when he does cotton to it, he does so energetically), Coutinho very infrequently and not very well, Can I can't say with any degree of certainty. I should not even have to mention Johnson; I just did, that should be enough of that.
Gerrard does it somewhat regularly, although I detect a 'painting by numbers' approach. I could be wrong.