Then why does Naruto have such a large fanbase?
He is still at the top of the popularity poll.
On a serious note, the same argument could be made against Luffy who's attacks are all variations of the same thing as well, he is merely incorporating Haku into it, the same could be said for Goku who always uses the same attacks, or Ichigo who has only a sword and one other attack (the Getsuga Tensho), and for all Shounen characters in general.
Really Sasuke, Kakashi, and Itachi are in the same boat, they are using the same attacks over and over again, just different variations of them.