we already have guild chat...
but i think you should add
Friend list Chat and Team chat (already mentioned)
and... would be nice if game Autosave the name of person we are whispering...
it suck to find the guy in list... or you rewrite all his name with /tell blablablabla
a small autosave of last talked person would be nice.
i dont know if you get it??
help me out. thx.