this training makes the 2 1/2 years training with jiraiya completely useless.... he was still a clueless ninja after they came back.

we can pretty much say jiraiya didn't teach naruto how to defend himself from akatsuki at all... and that was the whole point of jiraiya training naruto for 2 1/2 years.... wtf 2 1/2 years and naruto can use 4-tails of kyuubi's power but now they are trying to hold him back.

why didn't jiraiya train naruto to learn this new jutsu?

and how come kakashi was the only one who figured out this way of training with the kage bunshins?