You realize that that paper is literally calling the entire premise you’re arguing for as “unrecognized by law” and is an argument that the law needs to change, right? It doesn’t even sort of support you on the current status. It’s a giant call to action to change the law.
What you own is a license. I’m literally all cases. There is legally nothing in between copyright assignment and a license in any scenario. It does not exist, and is not capable of existing without completely rewritten copyright law.