After watching the sneak peek and the promo for the next episode, my theory is that Julia right now is basically in baby god mode...she has all these powers and is still finding her way, but no real direction beyond help people out. The next step up is to pick something to be a god of, which narrows her scope. She will still be super powerful, but she will be more concerned with whatever thing she becomes the god of and specialize in that. The sneak peek has her hearing prayers where people are calling to 'Our Lady of the Trees' for help, which probably hints at her heading in the direction of the book Julia.