We should have more sliders for things in general like musculature, body weight. We don't get to move around facial features at all so it's hard to make a character that feels unique, especially if you play a popular race like catgirl or Au Ra. A lot of the existing faces also limit individual expression. It's hard to make a Miqo that isn't cheery or cute, an Au Ra that isn't demure, an Elezen that isn't stern, etc.