1. Zoro's sfx is the clang effect that you get when you collide 2 metalic objects.
2. Luffy's and Sanji's are the sfx for Glare, definitely not a characteristic of CoC.
3. White lightning was never showcased as something remotely similar to ACoC. It's the first time that something like that appears, and thus, the safest option is to assume that it's something related to the power up that he got in that moment. Which isn't ACoC, but IJ.