As Discourse account creation works now, after registering on WordPress, you have to log into Discourse at least one for a corresponding account to be created on Discourse. It would be better if one’s Discourse account was automatically created upon reigistration on WordPress.
Another important feature would be automatic group synchronization between Discourse groups and corresponding WordPress groups. Not every WordPress group would need a corresponding Discourse group, but for the WordPress groups that do, adding or removing a member from such a group on WordPress, should add or remove that member on the corresponding Discourse group.