One of the best features Drupal has and I miss in WordPress is the possibility to set title to comments.
With a title, we can identify the comment subject, it can be resumed to a phrase. Comments become more similar to articles and aggregate more value.
I like to see comments as mini-articles. The post being the main article and comments being mini-articles that extend the main one. Now with title, WordPress comments are a bit closer to that approach.
Hikari Titled Comments enables each comment to have a title, so that commentators can give a subject meaning to their comments.
I dedicate Hikari Titled Comments to Chiih-chan, my kawaii great frient ^-^