Zoro has more refined development, there are moments like When in East Blue, Zoro declares to Mohji that they are not common thieves but pirates(as opposed to when he first said that he will never lower himself to Pirates level) In Baratie after losing to Mihawk, Zoro declares his promise to never lose again, In Skypiea, Zoro says that he will never be pirate on any other ship,In water 7, we see Zoro stepping up as a vice captain, We see slowly Luffy gaining respect of Zoro, All these moments build upto Thriller bark, Zoro here was perfect but Oda went above and beyond and gave him another great moment with Mihawk post marineford. Pre timeskip Zoro was leagues ahead in character writing. Post time skip Zoro was absent for over 100 chapters, so he didnโt get much panel time. We got to see him reminding Luffy to be careful in Punkhazard, Dressrosa was more focused on Law and Doffy, in Zou we saw him giving a nice speech about Sanji going to wci and its repercussions. In Wano Oda is finally focusing on Zoro. Him protecting Hiyori toko, having an connection with Okobure town people and Yasui etc, People seem to forget Zoro is one of the main part of Wano arc.