Hmm what if the arena system had people face off against people in their own rank? Like if you're a genin, you face only a genin opponent. Chunin, you face a Chunin opponent and so on. I know the attributes are 100 and everything, but I don't think it would matter if your opponent unlock their third passives and you don't. In the beginning, I rarely even won in arena because the main reason was my opponent had all their abilities unlocked while I haven't got my third mystery unlocked. So I was getting wrecked pretty hard. My first win came when I used Fire Main, Hinata 2-Star, Naruto 2-Star and Kakashi 3-star. So basically, my loss count is higher than my win count. I highly doubt I would be able to get to Special Jonin and above anytime soon. If we could only face people in our own rank, it would a lot easier for people to move to the next rank. And facing people with all their stuff unlock would be less likely to happen.