Let me state something. Since I've been reading the last 15 pages some of you are at each others throats. So let me make something clear since I've been on both sides of the field in MMO's.
Appeal to everyone and your community will thrive. I'm not saying give everything to everyone, but give something to everyone. Give hardcore players what they want, while keeping some content instanced. Don't make the entire game over world mobs, but make some of it. Let's face it if you looked at mmo's it would probably look something like this. Hardcore players put in more time, while casuals pay more money through multiple characters etc. In this game it doesn't have as big of an impact yet, but casuals normally pay for all the crazy fluff stuff in games etc. So like I said keep everyone happy.
Involve some overland HNM's, some forced spawn HNM's, Primals, more instanced raids. Have some of it all and you will have a happy and thriving community. Or we could go the way of SW:TOR and Rift and games like it, and be dead very quickly. Their way was just to throw easy instance content out consistently and everyone got bored and quit. Before people start freaking out, no one way or the other is wrong. In fact having all the ways is perfect, so do it. Competition will always suck people back in, and the desire to be better or better geared will keep people playing. This is how you run a great MMO and make money. Otherwise you're just like the rest, a quick money making scheme that lasts a year.
The fact that Developers read forums in this game and are responding is HUGE. If you haven't played other MMO's you won't understand why this is such an amazing thing. They have my undying respect for that, it's a very rare thing. I quit the game design industry because it's all about money, it's not about the product anymore. Working for a company like this must be an honor in this industry.