Like most I agree that Naby is probably too enigmatic. During the pre-season games I thought he looked very good actually, and I think some of his form has translated to this season. The problem, in some ways, is that we sort of want him to be a bit like Gini/Hendo/Millie - functional and 'doing a job' - and he's none of these specifically, and in some ways the best of all three combined. I think he's a better presser, a better short passer and passing through the lines, better technically, and will score more goals than all three.
That he hasn't hit the heights that have been expected of him is a combination of bad luck and bad form when given the opportunity.
Who knows though eh? Given an injury free season he might live up to the hype attached when he arrived. Or maybe he'll just be an 6/10 player and we got it wrong.
Again, using the Atleti game as a stick to beat him with is a nonsense, our midfield was pourous on that side of the pitch and to me speaks of an underlying issue with how we're currently set up. The quality managers are going to be able to find ways to exploit this (and Simeone is a good manager) and I'm sure Klopp sees a trend here that he'd like fixing.