Interesting observation. I like Leitner, but sometimes quality technique and a touch of class can overshadow the players actual impact on a teams dynamic. This is an argument I've had with regard to Cantwell. Looks great, and clearly a talented footballer. But overall impact on the side and ultimate result, I feel can be questioned. Especially if you compare this against a player such as Hernandez. Not as pretty on the ball, but really direct and gives defenders problems. This creates a dynamic that improves other players games and the team as a whole. I think Vrancic is similar in this regard, and to some extent Steipermann.
Of course this is a hard argument to have. Especially if said player scores a goal or two or has assist, like Cantwell. But I do understand your point and think there is something in it. Even if I'd be disappointed to see Leitner dropped.