Zoro has only really looked as good as he has because he has fought in technical, close-quarter combat punching bags like Kaido, King and Lucci where he can fully show off his one very good trait, his AP
Against a technical fighter like Katakuri, Kizaru or any Admiral really, his weaknesses like requiring Jimbei to catapult him, his otherwise ordinary human durability with no enhancers such as technology, devil-fruits or freak genetics like Meme/Kaido, would be quickly exposed