This is a very good idea infact. It will not be more work for SE at all, it makes everyone happy, as everyone will be occupied. Sure, it will take 2 patches to fix it this way, but still it is the best option for players and SE. Casuals only disagree because they want to do nothing and be as good as the one who sinks hours and hours into the game in order to be of the first to get down the new content. Thing casuals don't realize is they often play MORE than the hardcore, they just don't play effectively. What in the world is more casual than logging in for 1 hr a week to do 5 bosses and then wait to do the same next week? The casuals are the one who spends MOST time inside the game, but they are just not good enough to take down the hard content.