Review Center: Reviewer Check Marks

In Review Center, the Approver role has check marks or Xs depending on if they approve an item or send it back for more work, which makes sense.  However, the Reviewer role has only a check mark.  Although the check mark is indicative of progress through the review rather than approval of the item, many of our reviewers have left items unchecked because of the symbol.  It would be beneficial to reduce confusion and encourage use of the feature to change the symbol from a check to a radio button (or other neutral symbol) that doesn't appear to be "approving" an item.  A binary checkbox with two options for Reviewed and Not Reviewed would also assist reviewers who are hesitant to use the feature, and it would assist managers who are trying to track progress of their team and rely on the information from this button.