1- You know what a perfect jin, means, right? Those who became friends witht he bijuu and managed to put their chakra and fight together. It doesn't need to be stated to see that naruto actually did that. The fact that his BM is chakra made is because of the seal, or because of kurama. Not because he isn't a perfect jin.@1st bold Naruto was NOT a perfect jinchuuriki. This has never been stated to date. This is evidenced by his Jinky form only being chakra and not the real deal.
@2nd bold That hasn't been proven. Akatsuki did it their way because of a certain factor: Madara was the only one to know how to use the tech like that. If Pain would've known how to do it, then he would have simply done that from the beginning. He wouldnt need Akatsuki. Kinda weird that he would do a tech that takes 3 days instead of one that is instant... Also, the statue is able to take human subjects
@3rd Bee was already hit with Amaterasu and was able to perform the tech. Dont see why this is different.
2- Zetsu said he would have to extract the hachibi and the kyuubi before sealing them. Nagato wasn't as skilled as obito. And still, why would he waste time taking the kyuubi from naruto, then?
3- The point is not bee doind it. He could've done it, of course. But when madara would try topush the bijuu, the fake hachibi would turn into the tail, just like when obito first tried to extract it. So madara(and us) would've seen it.