I think I'm in agreeance with the majority of the thread that there should be a balance with a slight bias towards open world content.

70:30 Open to Instanced IMHO.

Too much instanced content really cuts out the feeling of being in a huge world when you do nothing but que up for events. Stuff like Nyzul, Dynamis, BCNM's, Darkhold, that kind of stuff makes sense to instance and I don't mind it. I do wish they would add more open world stuff though, thankfully the last patch will have me wandering about for a good while to come.