An AFK indicator wouldn't be a good thing in my opinion, considering you're timed out after 15-30 minutes anyway. If you aren't going to be around, go into /dnd and leave a reason or just sign out.
Before anyone suggests getting rid of the afk kick, think of the reason for it. It's to give the server more space (less players online). With that said, it's not going anywhere.
A typing indicator wouldn't be horrible; however, it would probably need a rewrite of how the entire chat system works, and I don't know if Shu/Desu is down for that.
I give the blocked indicator a +1 though. However, it isn't something essential, so it could be put off for all I care.