I would really appreciate a preview option for face + body markings, outfits, hairstyles in the Collections tab. We can preview armour but that's all (which is handy when deciding which motifs to farm next), but trying to update my toon's appearance in other ways is a real pain.
I love getting new cosmetics and outfit but dread the arduous process of trying to mix and match, remembering which body/ face is which, picking a hairstyle and then deciding I preferred the previous one and so on.
It would be a really small change but would make a big difference.