Please add "Recipient" as a filter for reporting

We have a few recipients who take quite a long time to approve documents and I would like to run the "Average time to complete" report filtering only by the recipients. Unfortunately, the only filter available is "Agreement name".

Adding additional filter options would be helpful in identifying issues with completion times. 

Despite the delays in approvals from a select few individuals our overall average time to complete is less than 24 hours so it does not flag as an issue as a whole.