Sony needs to just give these guys closure and say "No, we will not be allowing name psn id changes, ever"
If thats the reason that makes or breaks the console to a person, then move on.
Create a sub account, keep this one, and play your new stuff on the new account. When you want to play your old stuff, log into your old account. Just because you create a new ID, doesn't mean you have to delete the other. They don't preclude themselves from each other.