1. Would suggest adding a "Auto monitor new discussions" feature or the ability to set what I want to happen on new comments.
Right now, I can be notified of any new discussions, but I need to view the discussion, then decide if I want to monitor or not to be notified of new comments. Potentially, there may be some groups where I want to monitor every new discussion and every comment made. So this would be coming at it from the reverse; tell me everything unless I ask to un-monitor.
2. In the Discussion list, Date/Time of last activity on a discussion.
3. Be able to sort the discussions by name or by last activity.