If it's werewolves, maybe the reason they're updating the hair swatches is because there's a wolf form that's tied to hair color. That would explain why we didn't get any crazy colors, because purple wolves maybe weren't a priority? And if I'm being honest, the new swatches would make sense as animal fur. The browns are more muted and one of the blondes reminded me of a golden retriever.
Also, if they're working on body hair, I'm not sure the current swatches would go well with the new skin tones, but the new colors definitely would!