That very dark skin the draenei got would really POP on the Lightforged with their gold eyes and iridescent tattoos.
What I want more than anything is to be able to change hair and crest options independently on male draenei.
I would also like more tendril options on lady draenei. From a none option, to woven with ribbons, lightly bound behind the head, woven into the hair, rings and jewelry on the tendrils.
A pair of Mechagnome legs that allow pants to be worn instead of turning them into diapers. (Which honestly would just be fleshy gnome legs but with hinges at the knees.)
Iris color customization behind the glow for blood/void elves much like the Tides of Darkness novel and the Sylvanas 9.2 cinematic paying homage to it. Then subsequently removing the glow to show the iris.
Mechagnome druids. They would be like Beast Wars era Transformers. We already have robotic animal battle pet models that they could scale up. Bonus awesomeness if they made the “transformer” sound, or had a /yell that was “Mechagnomes, roll out!”
Only reason I don’t play races with large ears, tusks, etc. is because they clip through helm mogs. I wish we could set Night Elf ears to not stick out of hoods like antennae.