You should not need to use a Fantasia for minor character customizations.

[Gula]

Eye color and skin color, yes, those should be attached to the aesthetician. Everything else? No.

Or do as Aion did. A cosmetic in game store, bought with gold not cash shop, lets you pick spray tans and eye drops along with hair dye. The colors aren't from the full color wheel, so if you want specifics, you bought the cash shop item.