I would argue that most Allied Races just need a small touch-up. Probably nothing new as far as customization goes…
The exception being our Nightborne and LF Draenic races that only have 3 skin colors and roughly 0 hair colors. They could use an update, but probably not 40 new customization options.
Of course, tattoos for Kul Tirans, Void Elves, and so on would still be a nice addition. Also, Void Elves receiving a fair skin tone would be nice to silence the argument for “High Elves.” So, hopefully they reconsider this.
Doubtful.