I think difficult content and casuals can coexist. Most MMOs do the mistake and just focus on one direction, or at least it's not balanced between both types of players. I really like the idea of different tears of items. Everyone is abled to get a shiny piece of armor and the only difference is if you have the +1, +2 or the +3 one. Casuals can have something shiny and people demanding harder content can upgrade the armor. It's just bad when casuals get nothing shiny and have no feeling of improvement. But there should be definatly something for those all day long grinders. SE should just not make the mistake and focus on theese players and leave casuals behind.