The first one is really good. Some egits on Reddit were saying it was a "boring and static 2nd edition pose" but they seem to be in the minority. She's got characterisation going on with her pose and everything.
I quite like the first two. The third one looked better in the video I saw. I like the Slaaneshi-infested? look to it, but not a fan of the swirling energy. I don't think that ever works.
The Eldar (Aeldari now?) gods are basically Chaos daemons. He's an avatar of Ynnead, the Eldar god of the dead.
I think the concept of the sculpt is great and really well executed but the reality of it is that I have no idea where the hell I'd start assembling it, never mind painting it.