And therefore I welcome Ceres, Charon and "Xena" to my own list of planets.

So why wasn't Ceres on your list years ago? After all, nothing new has been learned about it recently. It was demoted from planethood when it was realised that it was only one of a whole collection of asteroids, and nobody wanted to give them all planet status. The same consideration applies to Pluto, now that we know it is only one of a whole collection of Kuiper objects. I booted Pluto out of my list at least 10 years ago.