I'd like to suggest that mute all should block only the global chat in server, not in whisper. It's really annoying while chatting in whisper with someone while tourney or bet server for example.
The reason we mute all is so that people pay attention so that we dont have to repeat ourselves over and over again. It takes at maximum 1 minute then everything is returned to normal, I don't think thats unreasonable
When I want to check what you stated I use page up. And as I said rules are almost always the same.