Moderator Improvements

As a review moderator I run into some difficulties ensuring that everything is addressed.  The following are some ways this could be improved:
1)  Ability to filter on questions or issues that are not answered or resolved.
2)  Ability to mark an item as completed that is automatically unmarked when a new comment, question, or issue is presented.
3)  Ability to filter on comments, questions, or issues without a moderator response.

For now my workaround is to follow every item in a review, make myself a reviewer, mark answered comments as reviewed, and manually unmark them every time I get an email notification of a new comment.