I actually agree, I think he has shown that he may develop into one of the best key forwards in the comp, but not brilliant so far.
In terms of his individual performance he has shown glimpses but his presence has undoubtedly made us a much better football side. Allows other forwards to get off the chain and his ability to take pack marks at the highest point really is unmatched (due to his sheer size). Will only get better and better.
We think in time we will have at least 4 players who can kick 35 - 40 + goals a season (Stringer, Crameri, Boyd, Dickson) and the really good teams spread the load across multiple options. All of those guys are dangerous on their day.