Haven’t gotten around to One Piece (that episode count is… daunting), but I think I really know it’s done as soon as they have a ‘tournament arc’. Give up all pretense and just have them fight for the sake of fighting.

And then there’s bleach, where, oh look, he has a somewhat cool sword, oh it has a cooler form, oh there’s an even cooler form, oh now he has mask powers, but limited, oh wait, we were lying that wasn’t his real cool sword form… Ugh…