I'd also like the option to input hex color codes for things like hair, eyes, tattoos, and makeup. Would make it easier to get your tattoos and eyes to be the exact same color if you wish. Or follow a makeup palette you have set up in yoru browser cus you suck at makeup. Don't judge me.
I tried to respond to his tweet to tell him this, but I am apparently a bot and can't send tweets. Even though I've only sent like 3 ever. :/
The lighting options and expressions you guys mentioned are important, too. I'd basically say use a CC like Final Fantasy 14's as a model. Lets you change environment btwn indoor and outdoor. While outdoors, you can look at day and night lighting. And you get to set it so it cycles through several of the most common emotes or so that it just has your character stand still. Can also preview the endgame armor for w/e class you've chosen and see how it looks.