well, in terms of jutsu, he definitely should have learned a lot more than just one secret jutsu over three years training with jiraiya. He should at least know several new genjutsu and ninjutsu by now. but I think its because the creators are having a hard time with adding new jutsus without encroaching on the originality of the jutsus of the other characters. SO maybe, if its about new techniques, it might be best to just give naruto modified versions of his usual skills like kage bunshin and rasengan. It might even be more impressive if he actually made the modifications himself (with the help of jiraiya maybe, but it has to be his original). I mean, he is the hero, and not having his own original jutsu kinda sucks. Also something about him controlling the power of kyuubi and using jutsus that require unbelievable chakra (since only he has kyuubi) should at least be present. Anyway, here is my thoughts for new techs:

Eien no kage bunshin (eternal shadow clones) - kage bunshin but limited to 2 or 3, but doesnt disappear even when hit, until chakra of user runs out, cancelled, or user dies. (like perfect replicas, so unless using a special detection technique ie sharingan, indistinguishable)

Haretsu rasengan (burst rasengan)