We have two approaches to our review workflows.  Some people will "complete" a review to indicate that they are finished reviewing all items, even if there are unresolved comments; others will only complete a review when all issues have been resolved.  (I am one of the latter.)

To help manage my reviews, two items in the review dashboards would help direct my work.

• Review Progress: for all reviews in my Inbox, knowing my percentage reviewed would allow me to quickly spot reviews for which new content has been added.  We get a lot of activity in Crucible and there are many reviews opened; using e-mail notification is not efficient.  I would prefer to open up Crucible and see, for example, that 4 of the 12 reviews have new content for me.
• Unresolved Comments: similarly, knowing the number of unresolved comments for each review in both the Inbox Dashboard and Outbox Dashboard would help direct where follow up / action is required.  E.g., "29 comments (4 unresolved, 2 unread)".  To get around this, I will occasionally leave an unresolved comment unread so that I can see it on the dashboard; however, this only works for comments raised by others, not by me.

FYI, "Age" is less important to me; ideally, I would be able to configure which columns are visible in the dashboard from a short list to help manage the available screen real estate.  Although, I realize that is separate request.