Rushed? King vs Zoro is going on for 4-5 chapters already, lol.
King was basically portrayed like a mini arc boss, Zoro had to get a significant PU in the middle of the fight, similar to Mr. 1 but unlike Mr. 1, King had so much potential to show far more stuff after Zoro's new PU - ie COC or/and awakening, as well as his importance in the lore. Zoro's finisher would be even more satisfying knowing it would land on awakened King who demonstrated COC as well, possibly destructive fire attacks too.
Also, King apparently got a single flashback panel, his face got revealed prior to that too and after that follows a scene when King attacks Zoro but gets defeated instead. Hell, even Senior Pink had a longer flashback than that. King doesn't have COC although he talked about kingly ambitions before.
Seriously, this chapter is not rushed?? King's best fire ability is his stats switching? A passive fire adding durability in cost of speed? That's it? Lunarians were portrayed to be skilled fire users, King's epithet is "WILDFIRE", yet that's all we've got...