I dont know why the transformation of Naruto looks so unique.I mean bee is able to to transform too,but he hasnt this epic chakra cloak like naruto?its just because naruto has only the half of the chakra i guess,but when he has both(ying&yang) his transformation must look like bees.that means that his cloack should vanish and his transformation should be the appeareance of kurama,and eveyone knows how kurama looks like.other things wouldnt make sense.
I don't think half of Kyuubi's chakra/lack of yang chakra is why Kyuubi gives off golden aura. It's more because its chakra is pure and devoid of any evil will, and since it's pretty potent... otherwise Naruto wouldn't have taken on the mini-Kyuubi form against Orochimaru and Pain.
I didn't thing about the fact that Kurama is good now. Oh man, we'll just have to see. If both parts of Kurama are *good* then it'd make sense if Kurama would only get bigger and shinier. ALSO M3J! Have you been deleting my comments??!?! I noticed on some posts that there not there anymore.