I consider bixie and DH zones, and they are instance hubs, but in all honesty they have received more in game time than most the other CoTF zones, least on my server they do. I apprecaite the fact that it took the developers a lot of time to create each of the instances and that is nice, even though they were heavily bug riddled. There are certainly issues with both sides of this, creating more regular zones, or more instances, many like both, and its up to the dev team to decide which to push out when. this might be the nice thing about campaigns, get one that is heavily instanced, and one that is full of regular zones. that way it can appeal to all players.