I am really confused and worried about the Amrod and Amros plotline now. We set up a very careful plot, and now... it looks like it will all be messed up.
So:
Now the Feanorians have a Palantir in Middle-earth? That would cause endless problems. Let's just get rid of the whole idea that Amrod ever found one. That would be vastly better. There was no other reason to include it in the story, except to lose it and upset Amrod.
Will there be any scene ever establishing that Amrod wants to go back to Valinor, or why? Will there be any explanation of why he gets on the boat at Losgar?
Will there be any scene establishing the relationship between the twins before we kill one? Anying to get the audience emotionally invested?
I'm also certain that it's not possible for Thuringwethil to be a shapeshifter. She can't be a regular Maia capable of shapeshifting, she needs to be an embodied demon, because she leaves behind a body when she dies. She has to have a real physical body, just like Draugluin, for Luthien to wear her skin.