I just wanted to add my thoughts to the official forums, most of this is things I’ve wrote on MMO-Champion but I’d like add it here with how vocal CMs are being. It’s mainly Void Elf related but I’ll add a few additional notes below:
Entropic Embrace (Racial)
I really like the idea of a Glyph or an NPC in Telogrus Rift to change the Racial visually, my personal opinion is that because it only affects the base model (no 3D parts) it looks badly implemented compared to everything changing. The effects of Memento of Angerboda (https://www.wowhead.com/item=133644/…da#screenshots) look much better as it also affects 3D pieces.
Hairstyles
I’ve had a mess around on the PTR and I really like the hair colours and ear lengths for Void Elves, the shorter ear make the shorter hair styles look better. The white, black and brown hair colours are not in yet but it’s really nice to see the blonde/white blonde with normal skin. I don’t see many people using tentacles on the lighter hair colours, it looks pretty terrible !
On the downside removing tentacles makes some of the hairstyles look even worse than they already did, especially the Transience and Sorrow for Males and Consuming for Females. This is much less noticeable on the Female one than the Male ones which look like they’re half a hairstyle. I would also like to add that Suffusion still looks poor no matter how it’s used.
I still want to see more hairstyles, essentially ones which give the Void Elves a more elegant option than most which look like they forgot to care about personal hygiene when they left Quel’thalas. There are some interesting options at the start of this thread (https://www.mmo-champion.com/threads/2382861-Official-High-Elf-Discussion-Megathread) and you give the options to Blood Elves as well as the OG race.
Eye/Skin Colour
Yes I know, we’ve been down this road before but I have a few final requests. For both Void and Blood, a blue eyes option similar to the purple one with a white sclera, I think this looks much better than the full blue we have currently. And for Blood Elves, give them a Dark Ranger pale skin and red eyes. Why not?
Accessories
This is another one I think that would be really nice to add which is feathers/plumes similar to the Dwarves as it would help reinforce the High Elf theme. I also really think Body/Face paint/tattoos would add a new dimension to Elves in the same way it has for other races, such as Dwarves, Tauren, Orcs and Trolls. Again, the first page demonstrates this really well. For Blood Elves as well, Runic Tattoos. It feels somewhat criminal for Blood Elves to still not have Runic Tattoos when they were show on the Box Art for TBC.
Nightborne
On a separate note I’m really happy with the additional Nightborne options, they add a lot of variety and I think the facial/chin jewelry makes them really unique and the option of eyes bring them much closer to their original Legion models. With regards to the Body and Face Tattoos an option to make them more visible would be really nice in addition to their current reflective style.
In terms of other requests I think glowing hands is a very nice option, along with eye colours. I’ve seen on Twitter edits with Purple and Green eyes and this would be nice theme to add alongside the White affecting Tattoos and Glowing Hands.
Conclusion
In addition there’s a lot more for Lightforged Draenei, however as my passion is more Void Elves and a soft spot for Nightborne I’ll leave that feedback for those who care more about our light infused space goats 
Overall I feel these are significant steps towards the future of WoW Customization and I’m happy that things are being brought forward.