I played 1.0 and honestly, I don't miss it. Contiguous worlds are a fallacy, there's always zones. Just that in the open world games they preload the next zone before you reach it so that it seems seamless. That said, 1.0 did have zone borders. Thanalan didn't just flow into the Twelveswood, there was a zone border separating the two. It was more the world was comprised of three super zones full of copy-paste goodness... that noone liked. Being an old XI player I'm not bothered by the world we have now one bit, the zones or varied and vibrant with lots of little details if you're willing to look. The cities being broken in two did seem odd at first but when you consider just how many quest NPCs there are in them it makes sense.