A friendlist. I would really like to know which of my friends are on at any time, maybe with a notification of someone getting on.

A news feed of some sort for when I'm doing boring stuff like crafting or waiting around for a party. Maybe a reddit feed or what have you.

Lastly and idk if this is Farfetch'd but what about some kind of pokedex system. It can search and tell you about the mob your are currently targetting and the possible drops and percentage rates.