gonna throw in these suggestions.

body scars, more face scar options (especially large scars like burn scars, acid scars, etc), and for my fellow trans masc individuals and enbies: Top surgery scars. Our characters are going to battle and being hit with some nasty stuff (like Fire IV)- I think more scars would make sense.
more hair color options such as violet (more blue than purple. Violet also has a tiny bit of green in it), realistic shades of ginger, more browns, and true black.
More height options like shorter and taller. Maybe some races allow for even shorter than other races. Hyur could absolutely get taller at max for example. Glute and abs slider.

Possible new option: walk and run variants such as something different for lalafell than the waddle.

the rest is miqote focussed.
other options that could go a long ways: more ear types for miqote, tail patterning made independent from hair, new tail patterns added, more tail length variation (mainly, allowing for shorter), ear patterning made independent from hair, and a few ear patterning options. We could also get more feral for options like long pointy nails and paws for feet.
new tail option: extra extra fluffy. Maine coon levels of fluff.