We also know that naruto wastes LOTS of chakra on all his jutsus and he knows it to. To beat Neji he knew that he needed all the chakra he could get. Knowing this he used very little chakra so that all the new chakra from kyubi would be used against neji. If you noticed, Naruto only used a normal Bushin No jutsu. This allowed him to use a minimal amount of chakra.

Naruto plans out his tactics almost as well as Shikamaru when push comes to shove. I think he followed the best possible actions.