And about Jen getting her powers back it wasn’t the road. She unbound herself by denying Agatha’s control over her, the Road just put the elements in her favor to do so, just like it did with Alice and Lilia. So to simplify it, Agatha bound Jen and created the Ballad, Billy created the Road because of the Ballad, Jen unbound herself thanks to the Road. So it was really Agatha All Along.