I have no particular stance on the topic, but I just wanted to point out that there's a significantly easier way to change your name and only your name (and the way you posted in your OP, ironically, may not even work). Simply deactivate your main character, create a new one on your current server with the same name, and then attempt to reactivate your main character and change the name.

Or, I could be a bit off (never had to do this myself), and it could require deleting your main character, creating a new one with the same name, and then bringing back your main character. I do not believe either one should be a big deal, and it costs $1 max for the second content ID slot assuming you don't already have one that you don't mind deleting/remaking.