I agree, basic CoC doesnt offer much besides fodder control and Kidd is a disappointment.
The point is weaponizing CoC was always a scary and powerful ability, hence why all the Top Tiers ranging from Admirals, Garp, Sengoku, Mihawk, Ace, WB, Ivankov all reacted that way upon seeing Luffy use it.
In fact, Doflamingo placed Luffy straight up over Law despite his broken devil fruit... all because he had CoC.
Again, I'm not gonna even try to justify Oda's lack of creativity in making it little more than an "uber powerful version CoA for the elite"; all im saying is that CoC stocks were always gonna go up even before 1010 happened.
It was always a hyped power/ability and we saw why in 1010 or when Kaido said "Haki surpasses All", it wasnt a surprise or a sudden revelation.