It's useful to have an opt out report which can help brands understand how many people are opting out from Feefo emails. However, when you view the report, you can't see any volume totals. In order to view the total volumes, you have to download the whole list.
Also, it would be useful to be able to see what the opt out rate is as a percentage of opens. Most marketers will want this data for reporting purposes as it again helps to understand the discrepancy between volume of orders, emails sent and actual emails sent.