I think Avi saves Tuon. Her vision of the future had regret that the empress of the Seachan had died so I think Avi realizes it's important Tuan lives. I also think all major good guy characters live. No one major has died yet. The only one that seemed dead books ago (Moraine) is still alive. Noal died, but he didn't seem that major to me. It just doesn't seem like RJ's style to have good guys die.
I was bored and decided to read through some theories for the fun of it. I don't have the book with me, but didn't Avi have a possible future in which Rand kneeling to the crystal throne happened or something. Like the possible future was bad and all that, but I thought that was a part of it.