Chapter 432 was BADASS!!! Naruto threw his Rasenshuriken. Some people might wonder how he threw it, and how it expanded. Answer? Naruto infused it with natural energy.
When you enter Sennin Mode, you "merge" with your environment, and are able to use the energy around you. Why not do the same thing with your spinning mass of uber sharp chakra (aka Fuuton Rasenshuriken)?
Naruto merge the Rasenshuriken with his environment. Now that Naruto and the Rasenshuriken are both merged, Naruto can manipulate the natural energy around the Rasenshuriken and make it move, while being sustained by the energy around it. It was also able to expand. All Naruto has to do is add more natural energy to the Rasenshuriken, making it bigger, kinda like he and Jiraiya did with the regular rasengan.
On a side note, I have a new name for the new Rasenshuriken, until Kishi calls it something else. I call it... Sennin Rasenshuriken!!!