I liked this one! It showcases a lot of what cool about the Eldar as a race and as a faction, with glimpses of the politics, craftworld life, and a whole lot of them at war. Characters were introduced from a lot of different factions and paths so it was nice to see so much diversity of the Eldar experience. The plot was fairly compact and the writing kept it going at a good pace, though toward the end it started to feel like the author ran out of ways of saying "and then things continued to go to shit." A few conversations seemed to happen several times as characters debated courses of action and their various fates, which just ended up revealing that not much actually HAPPENED in the book. Everything was extremely straightforward, the characters were all fairly one note, and they and the plot all wrapped up exactly as you'd expect. Which is fine, it just kept me from loving it fully.
Overall I'd say it was much better than the Path of the Eldar books, but I wouldn't recommend reading Valedor as a first introduction to the Eldar, as Valedor depends a LOT on the reader being at least familiar with them before hand. There are a lot of references to events that took place before hand, and a lengthy epilogue that hints at things to come, though I'm honestly not sure if those threads are picked up in other books? Navigating Warhammer canon is like that sometimes! I'd recommend at least knowing who Yriel, Iyanna, and Ynnead are before starting this book, as well as how the aspect shrines and exarchs operate.
I was also personally a little put out by the fact that the book is called "Valedor" when no one in the book refers to the planet by that name, other than in the very beginning. Shouldn't it be called Duriel? Just saying, lol.
But so, all in all, it was a good, actiony book with some decent characters worth rooting for, even if it doesn't leave the strongest impression.