Naruto died and was revived with more powers from the sage when he saved Sakura from Lava.. It wasn't the same level of Naruto who fought with Obito earlier.
Poor Kishi he wrote a simple manga - a pretty basic one for the most part. I wonder if he would ever see the kind of serious discussions we have over it, analyzing it from every possible angle under microscope. It should be hilarious to watch him- when I think of his reaction I can only imagine him like this:
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^ as he checks the threads over his manga.