This question is more like 2 questions. Is this arc about Zoro? No. Is Zoro playing an important role in this arc? Yes.
By the by, whenever Zoro receives a new sword/swords, he always follows it up it up with an impressive performance. Such as taking out all the Baroque Works agents and tying with Luffy. Or when he held off Kuma longer than anyone one else on Thriller Bark. So for those thinking Zoro somehow won’t be a main player in the upcoming battles because he wasn’t shoehorned at the end of a chapter, might want to consider that.
By the by, whenever Zoro receives a new sword/swords, he always follows it up it up with an impressive performance. Such as taking out all the Baroque Works agents and tying with Luffy. Or when he held off Kuma longer than anyone one else on Thriller Bark. So for those thinking Zoro somehow won’t be a main player in the upcoming battles because he wasn’t shoehorned at the end of a chapter, might want to consider that.