I propose an idea of an option of deleting accounts:
Reason:
Imagine you want to change your name, but you can't because the same user already exists. There there are many many accounts that are inactive from years, perhaps those people don't play anymore. or who knows...
If there is an option of deleting your account those very old accounts can be deleted for example this one:
The guy hasn't played since 2 years!!!
I want to take that name but I can't
Facepalm
Or if you totally messed up and want to continue story from the start, you won't have to make another account (if you do that might be bad for someone who wanted your previous name but he/she can't), just delete the existing one and create another with the same name
An example for this rule:
If you have less than 1h of playtime and you haven't came online in the last 2 years your account will be deleted