I don't quite understand. Are you saying "CC notification" and "quest talking head" have become restricted frames and therefore cannot be moved any more?
The only info on restricted frames I could find is this
blue post.
Which part of this says that restricted frames cannot be moved?
And where would we get a complete list of restricted frames (other than the mentioned Nameplates)?
For testing it would be good to have a restricted frame that is constantly visible, unlike "CC notification" and "quest talking head".