I'm not a mod, just an active user so my opinion on the first two doesn't really matter (even though I do think these would be good additions). I agree with the need for wikis as well.

That said, personally I could not care less about whether someone is online or how many people are reading specific thread - what I care about is actual interaction with other users, i.e. discussion. I treat kbin/lemmy like a forum rather than a constantly moving social-media site like Twitter so take this as you like. It's not like it would affect my use of the platform in any meaningful way.