As a casual player I've never found an MMO that interests me, so catering to a hardcore audience isn't a bad idea.

They've always felt like "single player games but you need help to defeat a bullet sponge every so often". I'm sure being a part of a guild makes these segments great but when you're a new player on your own they feel unapproachable.

I'd love to play a multiplayer game where players contribute to a developing story rather than repeat the same one everyone else has done. Obviously that's a ton of work so I'm not surprised it doesn't exist.