Originally posted by: ~Greed~
Remember the fight: Sasuke/Naruto vs. Garaa? Remember how Garaa would keep tranfoming part by part, until he become the giant Shuusaku (or whatever the name was) creature? Naruto is just beginning to transform. The double-edge sword is probably: once Naruto reaches the final-form, like transforming into a giant Kyubi creature, he will probably will go berserk and lose his mind.
Btw, whoever said all of these recent fights only consist of Taijutsu is because: those fights consist only of Genins! Genins don't even suppose to know how to preform ninjutsu; Sasuke is one of the few special case. Kakashi even praised Saskue for able to use ninjutsu as a genin when they first met. (Uhh... the 'get the two little bells' and pass the test)