He's incredibly effective at making that diagonal run from a central zone to exploit spaces down either wing and get crosses in, very very efficient, 1 touch to engage, a little fake for some space, either crosses with that new space, plays a one two or takes off down the wing and crosses at speed. No overcomplication, but does any of these as he sees fit again and again and again till they crack.
He's never going to be a main centre mid under Klopp regularly, he'll get a game in that position here and there; as long as he contributes the way he's most useful, mainly as an advanced midfielder with plenty of freedom to hit the wings, he'll have justified the outlay. Need to get that idea out of his head totally if he wants to stay long term here and commit to Klopp's idea of his position.