I think what you’re asking is pretty stupid honestly, and ruins the whole thematic of the demonhunter…
Though it would be nice to see deathknights get to choose to have red or greeneyes isntead of just the blue, so you could ahve red for blood and green for unholy and blue for frost.
But back to what you said, that does give me an idea that it WOULD be pretty cool if Warlocks could customise their demons in the barber’s shop.