Yes, absolutely, which (I'm assuming) is why CIE2K difference is not-quite-euclidean. My opinion is the we still need to find a better difference metric, rathe

Yes, absolutely, which (I'm assuming) is why CIE2K difference is not-quite-euclidean. My opinion is the we still need to find a better difference metric, rather than improving the color space. On that front, it's amazing to see how much of an effect "switching color spaces" can have on many algorithms.