I love and hate this. Love because it says so much about what the form chosen by the Moment meant to the Doctor. Hate because the Moment didn't chose Rose, folks, the Moment chose the Bad Wolf. It flat out said "In this form I'm called Bad Wolf.
"The only way to get rid of her is to send her into a parallel world from which she can never return; otherwise she would stay with the doctor forever. We can't get rid of Rose. So, lets send her parllel universe !