I don't care about Carrot in WCI.
Robin went multiple arcs without "peaking".
You are just using some headcanon that "Carrot peaked in WCI and that's it" when the story isn't even over.
>>IF<< Carrot were to appear next chapter and joins the crew, Oda could very well develop her in future arcs. She's a Mink, minks come from Zunesha. Zunesha has ties with the Void Century, Wano, etc. The Sulong reminding Nika, etc.
There are a plethora of ways to explore the Mink lore through Carrot if she were to join, giving her plenty of room to grow as a character, even if it's the "final saga".
Love her or hate her, she IS a popular character. And that was with just her participation in Zou and WCI (and she barely did anything in WCI lol).
Even if her popularity takes a dump due to Wano, her potential IS REAL.
And I say that even considering I was "TeamYamato".