Speaking of which, Galadriel and Celeborn will not play a significant role in the events during the First Age. We have to decide what she does, (at some point she'll visit Nargothrond) and later on, she and Celeborn will leave Beleriand entirely.Yes I like the direction of this. I think the strongest roles for her are to encourage the things that do happen (example: the healing of Galadriel), and discourage the things that could have happened but didn't (ie. a worse reaction by the Sindar to the Kinslaying reveal). That way her fingerprints are all over the narrative in the way that it actually plays out.
I have no idea how to go from this big picture down to actual events though. I would like to see her gently teasing Galadriel over her mood - not right away t first, but after she's had some time to heal. Teasing her in a friendly way, and coaxing her into singing of leaves of gold, would be a great way to get her to the next stage of recovery. Actually, could it even be Luthien who encourages G&C to head out East on their own?