This is one of the reason I am so annoyed at Lambert's signings and don't believe he really knows what he is trying to do. I have said it before we have 3 midfielders who all are just okay at everything, we need to play as a 2 man midfield to free up a more attacking players but with these 3 players they can't play as a 2.
I like all three of them but you would have to pick Delph and then we need someone who is strong/defensive player next to him. Delph has such a high work rate he can be box to box. I said in the Okore thread he could be a good DM, wouldn't mind seeing Delph/Okore CM partnership at all.