I think I want to see some more block options; I mean no one actually uses "Hide Hat" or "Double Pixel" and I doubt Minimap Opacity from Options.
Anyways, I wanted to see:
Friend Request Blocking-Disables the Ablility for people to send requests to you or for them tk just be sent and never show up as a message.
Party Invite Blocking-
Player A: OMG whirlz is farming and soloing a lv99 boss... Lemme screw him up.
/spams 100 party invite requests
Whirlz: /receives spam invites... WHAT THE....
*distracted and dies*

YES, we direly need to turn off this. Makes me lag even when me and a friend do it for fun.
Or atleast make it one invite to each person PER DUNGEON RUN!

-Whisper Blocking
So annoying having people randomly whisper "OMG WHIRLZ GUESS WHAT OH BOY YOULL NEVER GUESS THIS TEEHEE TEEHEE OMGOMGOMG".
That. Is annoying.

-Reply Fixes
I usually use /r.
Example:

From player B: hey whirlz u noob u kited in pvp loserrr now come bow at my feet
-whirlz starts typing /r
From Best friend: hey whirlz can u help me on this boss for a few minutes please.

The message originally is meant to go to Player B, but it goes to BEST friend:
To Best Friend; HAHA YOU WISH NOOB! loserr

....T.T

And also, it's quite annoying joining the wrong friend game because when they are on loading man, their name disappears as if they log out and the whole list is pushed up.