Firstly, I do think that the story arcs are decent, and, while not on the level of any GW1 story, I have enjoyed following the associated lore with each installment.
However, the current overflow and partying system cannot support events on the magnitude of the new Jungle Wurms or the Marionette. Players either cannot co-ordinate while in groups large enough to complete the events, or players are thrust into an under-populated overflow that lacks the necessary zerg to complete the event.
These problems lead to failures every time the events pop, and give players no incentive to come back and try them again, a vicious cycle.
I would like to see the community’s input on this, and some possible solutions to the problems I am seeing.