MMO's just aren't made for hardcore gamers anymore. If you play 10 hours a day for months and months, you're going to run out of content. It's just the way it is. If you play 3 or 4 days a week in 3-5 hour sessions, then new content will come out before you have time to complete all of the older stuff. This is how I play and I still have a ton of stuff to do.