It'd be nice if each quest we complete we receive a certain quantity of a new kind of currency (and, of course, harder the quest, better the prize), that would be only possible to spend with some kind of items — items which its "power" couldn't be high, otherwise the game would get even more OP —, or, I don't know, anything like it to make BoutCheetah funnier, not OP, and also to give a new goal to those who reached level 172 and are not going to buy membership.
Well, this is my personal opinion, let me know if you agree or disagree. Thanks.