If you clear a notification on your watch does it clear it from the phone? It's a tiny thing, but it's really nice to have.
Similarly, if the notification has a "Reply" option (say a Slack message), can you reply on your watch? Very useful when I get a work message when I'm walking the dog.
I don’t think clearing a notification on the watch affects the phone, but that’s not actually bad for me. Since I can’t reply from a Pebble anyway, having the notifications still on my Lock Screen is helpful so I can immediately reply from the phone.
As I mentioned in another comment, the inability to reply from third party watches is a bummer.
Similarly, if the notification has a "Reply" option (say a Slack message), can you reply on your watch? Very useful when I get a work message when I'm walking the dog.