Yes Carrot was "neglected" but this doesn't mean it was not necessary. And no we can't say that Carrot joining would be the worth strawhat joining. Why ? Because you are mixing up joining and being recruted. Carrot joining after an entire arc fully with the strawhat and another one a bit neglected would still be cool.
What would be a bad story on the other hand would be Carrot joining .. like that, (without additionnal moment after what we know) and no story moment or shining moment for Carrot after the joining. This.. would indeed be bad storytelling. But you have to wait to make sure of this. Until we are in Elbaf or anything else, we can't really judge the story of Carrot.
Yes Yamato could sail away, but this can be done under the rulling of Momo. As an ambassador.
What would be a bad story on the other hand would be Carrot joining .. like that, (without additionnal moment after what we know) and no story moment or shining moment for Carrot after the joining. This.. would indeed be bad storytelling. But you have to wait to make sure of this. Until we are in Elbaf or anything else, we can't really judge the story of Carrot.
Yes Yamato could sail away, but this can be done under the rulling of Momo. As an ambassador.
Letting Larrot join is bad storytelling in itself. I don't know where you get this sailing away as an ambassador shit because it sure was never brought up in the Manga as a point and never will, what type of "guardian deity of wano" goes on adventures sailing away from Wano as far as possible.