I heard an interview with Dicko during the year, where he was saying that this year he wasn't able to practice his goal kicking as much, because he had more issues with managing his body (niggles) than the previous season, and as a result his kicking hadn't been quite as good.
Still a tremendous level of accuracy, but does give some insight as to the trickle down affect on aspects of a players game, when they have some niggles that impact preparation.