So for example, if Naruto throws a Rasenshuriken at him, he can just switch places with Naruto and make Naruto tank his own jutsu?
Yes, that is possible. As a matter of fact, there are so many possibilities with Ameno.
1.He can switch places with Naruto so that Naruto takes his own attack.
2. He can invert the angle of Naruto's jutsus and teleport it closer to Naruto so Naruto takes the attack quicker.
3. If Naruto and Sasuke do a throwable jutsu clash, Sasuke can move Naruto in between the two heavy attacks so Naruto takes all the damage.
4. In a Rasengan-Chidori clash, Sasuke can switch places with Rasengan and instant KO Naruto.
5. In a throwable jutsu clash, Sasuke can invert the angle of Naruto's jutsu, so both Naruto and Sasuke's jutsu head towards Naruto.