I'd really like it if the comments had a special indication for whether the post author themselves karma-upvoted a comment and whether they agreement-upvoted a comment. This would be helpful for improving a feeling of conversation between commenters and the post author, because it would commenters to know whether the author of the post liked their comment or agreed with it.

For a good comment (and a not time-pressured author) you can just have a conversation by the author making a comment in reply, but I think there's a significant space for many authors between comments worth writing a response to, versus just worth voting on.

What do you think about this idea?