The problem about instanced zones (places) is that you wont be able to meet new people there. I cant remember how many times I made friends in a dungeon or any other place where I hunted stuff. but the big problem that instanced places counter is crowded zones. I dont believe there will ever be a real fantasy/adventure atmosphere if you meet 15 to 100 other people in a tight dungeon...
I have given up on waiting for BIS to come back to their senses and do a real ArmA 2 successor.