Well the thing is Pluto should never have been a planet in the first place! It was mis-named as a planet when it is just the largest Kuiper Belt object. It shares nothing in common with the terrestrial or gas giant planets except for the fact that it is round. It is made of mostly ice, and orbits on a different trajectory that is largely elliptical.
This was the right decision. Otherwise, Charon (pluto's moon) would have been classified as a planet and they would have been binary planets which is just screwed up, and Ceres the largest asteroid would have been a planet (which again makes no sense cause its an asteroid).
Astronomy is cool!
