Well, where to begin?
I've just found this and I'm so glad I did. From early on it was easy to see that there were some rather frightening themes emerging that could easily have become very out of character and completely unbelievable. But the handling of Elrohir's emotional state and the reasoning behind it is very carefully organised, making it believable and heart-achingly awful. I don't know if I'm reading too much into this but the discourse on the elven history of the orcs and then the sudden switch you have at one point to Elrohir and his dangerous perceptions seems very meaningful.
I love as well the way you have such a sensory laden writing style, which protrays the horrific nature of war and slavery that's often glossed over but also more gentle, beautiful snippets. The handling of the 'moment' between Elladan and Legolas was exquisite with the added, so very elven, touch of their, sort of, awareness of each other, if you get what I mean. I can't believe the misunderstanding! Where on earth will things go from here? I'm feeling a fair amount of trepidation for when/if Legolas remembers clearly what Elrohir did in the cabin.
Your weaving in of canon seems effortless!
Just generally, I love it and have no idea how it will turn out, particularly with these latest developments. Oh, it could go so many ways!
Can hardly wait for the next chapter!