Richie
If you're referring to the Staunton version you gave, off the top of my head I can see little difference between this version and the broadsides. Just a few characters, places and details have been localised which is what happens in oral tradition and in broadside tradition. I don't necessarily see a sophisticated hand in there.

The broadside hack tradition was at least equally as responsible as oral tradition for the wide variation we see from version to version of almost any ballad.