Also are you sneakily confirming that Carrot is joining by not including her amongst the offboard crew? Because it doesn't get more "want to explore with them and have fun" than stowing away on the Sunny to go on an adventure with the crew.
Nah but part of me still wonders if Oda is gonna have her be hidden somewhere or catch up to join. This is not because I have a desire for her to join. I just think there was a logical argument for her to join based on Oda's own fancies and the proximity to the end.
Or she could go try to rule over Zou for now, hate the experience, then see Zou die in the final war and join the crew post-series.
I never felt like she was meant to be a nakama on the voyage to the One Piece but having her as part of a larger crew of the Pirate King feels natural.