Refresh button
There are times in which I find myself trying to join a server and it's full. Supposedly, pressing esc and re-loading the server lists would make them refresh, but it doesn't.
Out of this, you end up with 3 not good options:
-close the game and open it up again, sucessfully re-loading the server list (takes too long)
-spam /jo 'servername' (not useful, it makes the server lag and you may also simply 'bounce' in and out of the server)
-go play on another server (hurr durr)(some gameplay methods are only available in specific servers, such as servers made for the sole purpose of betting)
I believe that any multiplayer game with server lists should have a refresh button, it's a simple feature, that adds a lot to the game, making it MUCH easier to browse the server list.