Every player has a life. Everyone has an alloted time frame in which they can devote to playing a game or MMO.
MMOs are designed to be a never ending persistant world which does not pause or stop. With the ever changing world of EQN with stories and mobs constantly changing and evolving in your absence.
The developers need to design content with what the average player plays their game for in terms of time allotment.
How much time do you usually play an MMO for? How many MMOs do you typically play at the same time? And most of all how much time do you think that content should be designed around to feel a sense of accomplishment during your average game time?