Actually, the story dictated Naruto to learn the powerhouse first. He still has that high-level criminal organization in his back that tries to get a hold of him. Spending precious time teaching him katons that will bounce of Itachi's coat will do him no good. Storywise, he needed the instagib-move so he is able to fight them.
And if 341 proofs one thing, then that he now has an instagib against Akatsuki. He now also has a show-off jutsu for Sasuke so he can whine that one is able to advance in konoha too.

Apart from that, I am totally on your side. He now needs to learn a broader set of jutsus to gain versatility. Right now he is a two trick pony with (A) Kagebunshin->Rasengan (B) Kagebunshin -> Kyubi.