Instead of blocking, I'd like to see a feature to drop a device in your profile. Sometimes you don't know if it's an old one or one shouldn't be there so it'd be nice if you could just kick it off so they'd sign back on (and hopefully tell you haha).
Essentially what you are wanting is what the Pause feature accomplishes. Dropping and not blocking a device just means the device that already has your password, just reconnects. Regardless if it’s a roommate with new cell phone, or next door neighbor on your network. Want them to tell you? Pause their internet. If they have a legitimate reason to be on network they will ask if network is down.