Yeah I agree Sanji had some good development here, but you can't ignore that right after this Sanji has the big scene where he tells Zoro that he should kill him should he lose his emotions. Sanji would rather die, than let this happen.
And then in the next chapter where they fight nothing is resolved, Sanji just defeats Queen and that's it. I would say this storyline needs to continue, Sanji's story in Wano should last longer than the 3 chapters we've gotten.