Originally Posted by azarhal 
GW1 worked fine without any big pictures.
I think, for me, GW1 worked mostly due to how you could push yourself to find new builds to solo areas with. Or to come up with a great party dynamic with how your Heroes' skills meshed with one another to create a bastion of awesomness.
So, yeah, the variety in skills, the tactics involved in using those skills staved off any apparent lack of "big picture" content. Of course, GW2 has little to no variety in skills and tactics, so it has to rely on content updates and chasing its own proverbial tail.