They also said they are not doing customization for Allied Races
at this time, though that they can bring the expanded tech (like separate eye color from face) to them as well.
And did I not tell you, that people were going to ask for expanded customization on their Allied Races?
See, it is very likely that once original race customization finishes, they will expand customization later on for Allied Races. And since we see from the examples they've shown that they're not sticking to the original color palettes (pale Undead -> now getting Dark/Murky/Mucky options, blue trolls -> now getting Tan/Dark/Black options) this means the goal of these new customization updates is purely to increase aesthetic diversity.
Comfortably, I can deduce that for Allied Races - when it's their turn, will also get the same treatment. You should hope that they decide to keep AR within a specific aesthetic, but like I already said - judging by
desert trolls and
blood trolls who have completely different environments at aesthetics to jungle trolls -> Blizzard doesn't seem to care.
As the goal is purely, increase the aesthetic diversity for any given race.