Imo excellent animation isn't enough to qualify this as a masterpiece, the first half is really good but then it turns a really good martial arts tournament into power ups that apparently come out of nowhere, (maybe not) then everything revolves around that powers and it gets really messy. Character development is done in little time and in just some pieces of dialogue after the first half just to get some action. Then they introduce characters out of nowhere and then they never appear again.

If you would like to see good character development and fights with OP powers I would recommend Bungo Stray Dogs.