With all the new customization options coming in Shadowlands and being confirmed they will add more over the course of the Expansion here is the list of the thing i want to see added for the Elves:
Alliance: Night Elves:
1.More Regal/styled hairstyles
2.Golden Jewelry (and maybe Blue and bronze)
3.More jewelry to beginn with like tiaras/crowns, bracelets,rings etc. (and for the Males as well)
4.Maybe a muscle Variation: to choose between the DH and Nightborne one
5.More markings and more Colors for them like pink, yellow/gold, white/silver etc. (and also add them to the Males as well)
6.More hair and skin colors like a red hair color and lavender skin color
7.Purple and Green eyes
8.More tattoos and more Colors for them (and give them to females aswell)
9.More facial hair for Males like a very long one Malfurion style and very well groomed ones
10.Maybe Stars instead of leaves (Since they are the Children of the Stars)
11.More faces
Void Elves:
1.Natural hair colors to go with the fair skin options
2.Tattoos like Alleriaâs (Colors purple, blue, pink,yellow etc.
3.More void skin colors like a half corrupted one by their void form
4.More void hair colors
5.Maybe the DH muscle Option
6.More jewelry and more Colors to them (and give them to Males aswell)
7.The ability to control/toggle their void form anytime you want
8.Ear variation/options
9.More eye colors like the pink one the High Elf npcâs are getting
10.More faces
Horde:
Blood Elves:
1.More hairstyles aswell, maybe some wild looking ones for the Farstriders
2.Tattoos and facial runes (colors red,yellow,green etc.)
3.The DH muscle variation for all classes
4.More jewelry options and more colors for them (and give the Males access to them aswell)
5.More eye and skin colors (like the Dark Ranger options and Sanâlayn ones though those would work better for Forsaken since they are undead, but some light based skin and hair colors would be very much welcome)
6.More facial hair for Males
Nightborne:
1.More hair and skin colors
2.More eye colors
3.The DH and Night Elf muscle variation
4.Arcane features like glowy hands, more Arcane tattoos and more colors for them, maybe some Arcane/Leylines energy through their hair like the Night Elves leaves options)
5.Option to have narrow eyes like the NPCâs have
6.More jewelry and more colors for them like Blue,red,pink,white etc.
7.More Younger/beautiful faces
8.More facial hair for males
9.Ear variations
This is also an option that applies to all races: different Standing poses maybe
Obviously they can add more options for them but these were the ones that came into my mind.If you have more ideas feel free to list them. Here is also a link i made for Night Elves a few days ago: Highborne options for Night Elves