What I mean by zone wide is more so along the lines of invasions but for old zones "Stop the alliance or stop the horde from gathering resources in Arathi Highlands." Etc.
And gives rewards similar to current WQ system, I feel it may be a way to bring back some action in many of the old zones? And they can add achievements to earn zone specific pets, mounts etc after doing so many different varieties of quests in a particular zone...
The question is, would you participate?