Bro...Sanji is a cook. Fighting is a BONUS to what he does. It is not the essential component of what he does in the story, it's only one of them.
Zoro's only job is to fight. Literally that's it. He serves hardly any other purpose besides being a protector.
The difference in WCI was that Sanji's development was treated as a central portion of the arc, not an afterthought or a side plot.
Zoro has been hinted to be the second coming of Ryuma multiple times man, both in and out of the manga. Of course Luffy is going to be recognized as a savior of Wano, but for Zoro's development, it makes sense for him to be recognized in a similar manner. It seems like you are saying that Luffy will be the one who is seen as Wano's "Ryuma" and that is insanity in my eyes...whether or not Oda actually delivers is one thing, but if you at least recognize that these things SHOULD be delivered on is enough for me