I would love to see appearance options like this! In the last couple weeks alone, I've come across three different players who were trying to "pretend" their characters were Zeltron by virtue of blue headscarves on species with reddish skin tones, or by asking people to imagine the reddish skin tone on humans with blue hair. Similarly I came across two people playing Kiffar, one of whom played a Trooper to get access to tattoos but were trying to RP the character as a Force-user, and another who played a Jedi class but who consequently had to go without tattoos. And I've long known another two players who have been trying to play Echani without access to the eye and skin tone options they wanted (myself being a third person of my acquaintance in this camp).
All of my examples are RPers, of course, but RPers buy CCs too! (And are some of the most easily entertained and loyal players because they make up so much of their own content, and just need to be given fun tools precisely like appearance options.) And I'm absolutely positive it's not just RPers who would like these options. I'm sure a huge majority of people playing this game are Star Wars fans first and foremost, and even if they don't actively RP they do want to be able to recreate some of their favorite lore characters and species.