The only players that can do anything to appease you guys from that spot are tricky wingers like Nani. There is no LWB in the world that can consistently produce from that area of the field while facing a minimum of 3 defenders between him and the goal (RM, RB, RCB).
If you are complaining about just assists, well, that doesn't make sense either because he had half a dozen last year while missing a month, more than Zuniga or Coentrao had in like 2-3-4 years combined.
People are starting to misread our formation now when they claim the wings are essential. They're not. They're mainly outlets and combination players when we are in the final 3rd. They are not asked to deliver the final ball. That ball goes into the central area for Tevez and Vucinic or one of our bursting CMs to deal with.
If any team is relying on wing backs to produce for the offense, they are in trouble. But even then, if you get into an open game and give Asamoah space, he has the pace and smarts to affect damage to the opposition. The only thing he struggles with is packed defenses but in that case, you're better off putting Giovinco at LWB because there is no LWB in the world that you can give the ball to and expect him to dribble his way through the box.
There is even a clear paradox on our own team. We call Lichtsteiner one of the best around but he had 2 assists last year while Asamoah had 6.
What I would be ok with is a more offensive wing player used as a sub in certain scenarios but Asamoah is a fine starter. There are very few around in that position that would be better. Zuniga and Kolarov are jokes compared to Asamoah.