Personally, I did understand instanced zones for the first week of game release.
But now are unnecessary, these zones are no longer over-populated.
And to be honest, is a pain each time I am going with friends to do quests, hunts, fates... We have to relog 653423 times to be in the same instance.
Please remove instanced zones or at least let us choose when we teleport in (like when you zone from adjoining area.