its not a standard feature, in fact not many mmo's have this feature and thats a relief, bloody hate chat bubbles appearing everywhere. totaly no need for them.
It is, if you look at most of the modern
MMORPGs that had some kind of success (WoW, LOTRO, Age of Conan, Everquest 2, Guildwars, Star Wars: Galaxies) you will realize that most of them have chat bubbles or at least overhead text.
If you hate them most of these games have the option to turn them off. Would it hurt you guys if you could just switch them off and people who really want them or can not play without them can use them? I don't know how anyone can be annoyed if they implement it like that.