While I think the image is useful to a a degree, because of the huge difference between computer monitors. That's why a description coupled with a picture would be the best method to accurately represent the shades - because while people can get a clearer idea of the shade from the description, they will also be guided by the picture.
I think it's important to have shade descriptions to start with, rather than requesting descriptions one by one, because if I'm only interested in iridescent shades or duotones, the pictures don't show any of that. Or if a shade is intensely shimmery.
A good description would be:
*very* light champagne w/ a hint of peach, and gold and peach shimmer (great base shade)
or
true electric sapphire blue, high shimmer
or
looks white but goes on a light iridescnet blue w/ lavender shimmer
