Glace, I've actually been highly critical of the username changes that people have been asking for. And it's not the system that's the problem - it's the dumb choices people have been making.
So far, other than yours, I have only liked three of the username changes: Shadow Arceus to Cinesra, Guy89 to TheGuy, and TheDarkLucario to TDL. All the others are just...terrible.
I honestly can't wait for January 2013 or some other special circumstance so that I can change back. It was a nice idea at first, but after 4 months I'm tired of it.