I only saw the Casey game on TV and the only time I have seen him play, however, from what was on display, there does seem to be that "X-Factor" about him. Like others have stated, he does go missing, but, I would assume that is probably a fitness issue.
Melbourne seems like they can develop their young kids, so he may be worth a rookie spot and not just a waste of talent. Pretty sure Jason Taylor & co would be looking into him along with a number of other players to rookie.