He's currently not at the top because of so many immunity teams that are more accessible to even the worst of the players. In the future he'll get a mystery upgrade which'll give him an aoe interrupt every 2 uses. What he lacks right now is Five Kage Conference Madara, who I doubt will come out in less than a year(Future Obito/10x better version of Han + Kisame). Considering the immunity and dodge mechanics atm, I'd recommend that you don't get him yet unless you really want to