This is soo needed. Just a thought, but rather than a 'condition unchanged' link, randomly pick one of your review metrics and give the user a single click opt

This is soo needed. Just a thought, but rather than a 'condition unchanged' link, randomly pick one of your review metrics and give the user a single click option to rate on that instead. Another option might be to invite them to reply to the email with any follow-up thoughts on the product to add to their review.