Now having finished the Ithelia story line and while I liked the evolution of the story after Necrom (the Necrom with the revelation was awesome) I rather would have prefered another storyline where it was shown that Mora was completely wrong with his prediction or maybe Ithelia has foreseen what Mora feared but she had to escape in order to prevent the catastrophe that was actually set into action by Mora while he tried to prevent it. In the end Ithelia would get rid of her powers as well and by some doings whe became a mortal instead of vanishing somewhere else.

[My interpretation is with the implemented ending Ithelia came into our world where there is no such thing as magic and no way to go to Nirn]