Within an email campaign, it would be very useful to be able to run a Variant Performance By Domain Report, in addition to a Message Performance By Domain Report (one of the options in the dropdown). This would make it easier to see if one of the variants has resulted in a deliverability issue. I understand one can create the variant report by going through more than a dozen steps outside of the Email Campaigns area but it would be much more useful and convenient to run this report within an Email Campaign.