? They both have character.
Carrot is nothing. Failed at the one job she had on wano.
Alright I'll bite. Carrot was introduced in zou. She played a majorish role in wci(even if you like wci and her or not, that is just what happened). Then in wano, she got sidelined hard. But she wasn't the only one that got sidelined. Even zoro, whose grand arc wano was supposed to be, got sidelined.
So, if your problem with her is she isn't much of a character, then you can get a better character with development when/if she joins and gets time to shine in an arc other than wano which was already overloaded with useless side characters.