Personally I enjoyed the Zoro vs King fight, it helped Zoro grow in terms of welding Enma the same way Oden did and releasing Conqueror's haki on his blades.
The only negative aspect was how it only took Zoro figuring out that King's defences are weak when he is moving fast, for him to lose the fight. Luffy figured out Katakuri's future sight and he still regained composure, he brought out Snake man and he found a way around that.
At this point the only thing special about King is his lunarian abilities and devil fruit, whereas Katakuri had Future sight, good devil fruit, awakening and CoC.