I like this idea, because it feels "harmless" to implement and disable whenever without any negative consequences. Right now there's no indication of what the comments order means. It should be clear if it's sorted by date or karma. As to the value indicator, we could calculate the [z-score](https://en.wikipedia.org/wiki/Standard_score) of each comment. Showing it as color means it will not be accessible to all users, so a word signifier (i.e. [nothing, "valued"]) is better. And when and if we add flagging for abusive/hateful/spam comments we can show a "flagged" signifier.