It's clear that WordPress' comment system is a basic one. I would like to propose a complete overhaul of the system, making it more along the lines of Disqus, but of course, with WordPress log-ins and usernames.
New features would include:
- AJAX commenting
- Real-time updating
- Up and down-voting (configurable: on/off or up-voting only)
- Moderator role: can edit and delete comments, mark them as spam, or add the posting user to the ban list.
- Flagging: users may flag comments they find offensive or spam. These comments can be configured to not show upon a certain number of flags, but only if the administrator desires. Otherwise, they would be labeled for moderators to provide a final verdict.
- Profiles: nothing fancy. Look at a Disqus 2012 profile for an example of where I'm getting at. It would include the username, their website, their number of comments, and their most recent comments. Preferably loaded in-line with the comments. Once again, Disqus 2012 is the example.
That's all I can think of, at the moment. But yeah, if anyone else has any more ideas, feel free to add them. Or provide feedback, of course. ;D