I would also love having BT old ninjas, it would make a game more varied but in this game it never was about balance, imbalance is on purpose to force people to spend some money if they don´t want to be on losing side.

There is still stronger beast to come like usual, as it is business model of this game. As time passes we have bored whales who are tired of compete with other whales throwing out big money or they are so rich that they can´t find enough challenge for them so they quit. And on the other side there is many f2p players who gave up chasing whales. f2p will never be happy until they realize they must be losing side ( not entirely true as you powering up and are stronger then new server guys). Best they can do is realize that they don ´t need to be top 10 and no reason for chasing that rank, just being patient and enjoying better aspects of the game. There is always stronger ninjas to come and bigger rewards to come as this is business model which seems to be working apart from that many players quit (still enough players incoming) . Not native english speaker but I think people understood and we all perceive it very similarly.

If I can repair myself, I don´t know if they do, but it seems to me kind of obvious that they want to reach their power lvl, ninjas etc...