Well that's true but only for the rooftop because its somewhat zoros arc after all , if he wanted to make zoro unique he would make him and luffy fight kaido, or make the shougen of wano be actually strong , but in the end he fought king and sanji queen while law and kidd fought big mom , based on feats zoro is stronger then kidd and maybe law but portrayal oda wants them to be almost with luffy imo. Kidd also is like a Walmart version of luffy same for killer and zoro