There's an acknowledgement in her comments that race matters and is relevant, and from a fairness standpoint, we should acknowledge the impact of a particular political structure on voters of color. It's not unlike something you could see Justice Sandra Day O'Connor saying. A rigid quota system may be bad, but diversity is a compelling interest, and we want institutions to reflect society as a whole.
There is a real question of whether nine unelected federal judges know exactly what's best for Vermont politics, and maybe local politicians have a better sense of what's best for local politics. This is a tension between expressive rights on one hand, and the ability of local citizens to control the election rules in their own states and communities.