I’m a little skeptical about excluding admins from flag notifications unless we make admins moderators by default. In that case the flow would be “if you don’t want these notifications remove yourself” rather than having to know that you need to add yourself to the group to get them to begin with.
We know from our experience hosting that it’s not unusual for a site to have 0 moderators, and sometimes admins will let flags pile up for a very long time unhandled even when they receive notifications. Removing notifications from admins by default in those situations can make that situation worse, or even accidental.
We’ve been requested to have preferences to control specific notification types before[1][2], it’s a bigger project but I think it makes the most sense.
This is just a sketch, but the idea would be something like this:
