Don't get me wrong, I really like what has been announced so far (color picker), but a bigger impact will be felt when we have novelty in actual shapes and additives:
If we only get to have 4 face options for most races, then the "details", like chin, mouth, eyebrow, nose, etc, need to have more variations to be more impactful in the end result.
Muscle slider should be available to everybody.
Au Ra horns should be separate from face choice.
Facial features like markings, moles, scars, should be all optional. One example: currently the Miqo male face 4 has permanent eye markings, while the face 1 got the exact same markings, but optional.
Barefoot should be actual barefoot. If modders can do it for so many years (and looks good, you can google the images), then there's no good reason why the actual game could not.
Hair accessories should be dyeable. They could finally declutter some race hair choices, when there's 3-4 copies of the same style but in different colors.
