Great post, Justin, thanks!

Disabling comments with a click of a button would be great! That could make the whole comment-related admin interface disappear. Useful to make things more user-friendly for website-owners that don't need comments.

However, I love comments. How would we otherwise all share our valuable feedback? ;-)

Seriously, some more support for comments in core, and comment types specifically, would be interesting. Having comment types (register_comment_type like register_post_type?) would be a great gateway for supporting different kind of interactions from visitors/subscribers. Think about likes, ratings, web mentions indeed, ... It could make websites more interactive and social?