I'm not actually sure why they decided to change it. To explain this, we probably need someone on the Chinese server to come explain it or one of the mods who understand the balance changes to the China servers to help us. But tying back to my original point, yes, China HAD percent tactics, but I believed they've removed it quite some time back, due to complaints. Unless there is solid evidence proving that they still have percent tactics, fully booked kakuzu does that much damage without percent tactics, so y'all that were considering the kakuzu dmg was only op because of % tactics, well think again.