Same issue here, but kind of different.
Had a 29 Warlock that had the name I wanted, so I deleted it and changed my name to that one. Well after about 3 days it shows my new name on my player frame and in the character select screen, but besides that everything else is my old name. This is Including tooltips, target frame, target of target, group finder, whispers, etc.
The biggest problem this has had on me is if I am trying to recruit for a raid or dungeon people will see the message and try to whisper me with my old name but the game says that person does not exist, this is also the case for when I try to set myself as master looter from the player frame. The only work around I found was to target myself and use the target frame to set it.
If this is such a big problem for a lot of people, this needs to be made right and in the meantime the feature disabled. We did not pay $11 for a disadvantage.
I’m sure most of us in this thread have tickets in (31 days wait time on mine).
Please, can we get some sort of response. Anything to say “Hey we hear you and know about this, we are fixing it.”??