Leve's are quest chains, effectively - it's the root essence of the quest grind without the predisposition of trying to assume it's not. There really isn't any need to do more in this department except perhaps some more unique Leves. But then agian, what is Crystal Tower if not a more interesting Leve?

As far as instanced content vs World Content? You'll probably not hear about more open world content until 2.0 nears, in which case it'll probably be closer to Beta Time anyways.

Either case, so long as open world content does not distill the essence of aggressive competition, I'm all for it. I don't particularly feel the pull of waiting for 4 hours for some world boss to spawn only to watch the botters get it and sell the item, spawn timer, and claiming program for real life money.