wow I actually really liked this! I had moderate hopes for a 280~ page book about a faction that is often written very poorly in wh40k, but i was pleasantly suprised. overall, the book felt extremely eldar-y with plots upon plots, uncertain allegiances, and the manipulaton of fate and schemes stacked on top of each other. it was done in a pretty realistic way with only vague insights into the future guiding the diff group's attempts to control fate which was, again, very immersive and on brand for the eldar - i saw this with ilmaren originally helping the voidsplinters, then the ilmaren farseer revealing he also gave away myrins location at the start, it was all just tricksy goodness
i enjoyed the pretty overt homoeroticism too - it was pleasant to see romance/sexuality in a franchise that is often just straight man army shooting bang bang vibes, and the eldar thematically fit for a race that doesn't really see gender or sexuality. it added a nice dimension to the combat/plotting.
i also enjoyed the adventure influence here - it was fun to go to different locations (like a black market set on top of a dead space whale the size of a small moon or something, as well as to a maiden world and the corsair princess's lair thing) - again not something I've often seen in 40k books but thematically veryyy fitting for a corsairs book. similarly, it was great to have different perspectives on the different ways of eldar life - corsairs not trusting craftworlders, craftworlders thinking corsairs are uncivilized, drukhi joining the corsairs but fighting the craftworlders, exodites existing the whole time lol. great lore dumps
the action was also primarily pretty good - the final climax was excellent with the void battle, boarding sunstompa, then finally rescuing myrin from sunstompa (and then from falling into orbit??) was excellent. i LOVED the ending with quite a few hints at a possible sequel - xela's disappearance into the warp for a few weeks and sudden return (evidently very traumatised) was pretty sick.
particularly favourite characters/arcs: myrin, taenar, xela, the warlock, farseer caman, visiting diff locales, plots within plots, battle for the rule of the corsair faction, final battle vs urguz