He absolutely is making the difference right now.I had on of the many football panel shows on last night where I wasn't particularly paying attention but apparently this season we've improved from being the 10th best side in transitioning from the defensive 50 to a forward 50 entry to being the first and the argument was that Zorko was the one who was making the difference on that front. I only really saw the graphic so didn't hear the short discussion about it but food for thought in terms of where to play Zorko.
Questions on his fitness, defensive attributes and capacities in this role against the better teams are what many here seem to see as the negatives.