I've just had a look at the "Domain Breach Report" available via the 1Password website. I'm requested these reports from "Have I Been Pwned?" in the past so am already familiar with them.
Currently the only way to interact with the list is to click on each user name and make an assessment if any action is warranted, which is can take a little bit of time.
I have suggestions for the report presentation:
1) Allow a view that shows all user/source combinations in reverse order of the breach data being known about, so that I can quickly see which users might need to be prompted for changes.
2) Allow a filter to remove from display the "breaches" that don't actually contain credential data - plenty of my domain's addresses are in various spammer databases, there's nothing I can usefully do with that information, so it just obscures the more concerning breaches.
3) Allow me to order by current/suspended members, and other addresses. Some of these other addresses will be former staff members, some will just be guessed/typo'ed addresses (in the case of spam database breaches). These are the records of most interest to me as I need to ensure accounts have been correctly closed, and data deleted.
1Password Version: Not Provided
Extension Version: Not Provided
OS Version: Not Provided
Sync Type: Not Provided