I'm not trying to underestimating him and yes his clan is indeed special and that he's taijutsu user, but how did he manage to keep on moves he can't see? For example huyga clan or the uchiha clan have abilities for that. Naruto has sage mode, the 4rh raikage has incredible reflexes because of his raiton but kimimaro has incredible reflexes from nowhere. You can't learn that only from training your taijutsu style it's not enough. You need a kekegenkai special ability for that or something. His kekegenkai is just these bones.