I see essentially 3 opinions about the /who commands.
1) You liked, miss it and was useful.
2) It was okay, but not needed.
3) It was an invasion of privacy.
The 3rd one, sigh, I can see how some would feel that way, but I have difficulty in seeing how except in one case. Many people are AFK, but are still logged in. You can always ignore someone talking to you. Chat is optional in most FSs, but not all. In an FS where the AM or mages monitor participation via /who, well, what can I say but each FS can have it's own rules. I wouldn't like that one and if I wanted to be in that FS, I would be happy it is no longer available.
The 2nd one, I very much agree with. It wasn't/isn't needed and there are other ways of dealing with everything it helped with. Thank you for your suggestions as they appear to be what we now must do.
Obviously that means I'm in the 1st category. While there are many reasons I liked the command, I'll just explain one I haven't heard or missed in my reading this thread. I'm a mage in a couple of FSs, one of which is pretty chatty with both everyday conversation and a lot of helping others. It's not uncommon to log on and see 100 chats. I back read it to see if there were unanswered questions or the answers were incomplete or incorrect. /who let's me know if the right people are possibly on before I chime in. Especially in the last two cases, it is good to talk directly with them and let others also hear and discuss. It is, after all, usually opinions. An FS wide message often seems too formal, doesn't invite much discussion and the person who gave incorrect info may feel slighted or reprimanded when done that way. It's easier, at least for me, to prevent that from happening with chat. Oh, and thinking about it, the mobile version doesn't yet support messages, though they may see it later when using the browser version. (Please, lets not divert this thread that version.)
So, to me it was useful.
Was it necessary? No.
Did it serve a function? Yes, for me and others.
Was it harmful? In my opinion, no, but others will disagree with that.
Will Inno bring it back? Not unless they replace the entire chat system, and maybe not even then.