Ignore the closed-minded, idiotic naruto fanboys. Naruto at this point hasn't grown much, his battle strategy, use of jutsu and his ability to assess his opponent’s strengths and weaknesses are still the same. So while he may have more charka/stamina now and he has a more powerful rasengan nothing else has changed. I suppose his lack of growth is most likely due to Jiraiya's training method with him. Naruto is not a good student and Jiraiya doesn't seem to have much patience with him so if his training with Jiraiya for the last 2.5 years was anything like when Jiraiya taught him the rasengan there would have been very little actual hands on training.

If Naruto had grown that much his character would have changed a lot which is not something I think Kishi wants to do at this point. Besides if Naruto had suddenly become so strong the battles he has been in would've certainly had different outcomes and the show itself would’ve had a different feel. Naruto is supposed to be the inexperienced, overemotional underdog who blindly rushes into things. That is what most shonen protagonists are.