I agree that we need more naturals. The blonde swatch example that you created looks great.
I would definitely like a couple of additional black, dark brown and even greying options. At least 3 or 4 of each with different undertones.
OT, but I’d also like to see different versions of the same haircut. My male sims usually have longer hair, however a version of that same length of hair put in a bun, combed to the side etc. often does not exist. Those hairstyles are either too short or too long.