I wouldn't class half of that as essential information, I mean, who really cares about what member no. someone is? The joined date is also viewable in the member profile area. I really don't see the need for it.
I'm also not receiving notifications when mentioned in posts. I've ensured it's set up with the correct defaults accepted. One other thing I've noticed is the profile link it creates. Yesterday I mentioned a member and although it made their name into a link, it would direct to my profile.