carraway nailed it:
I would add that the core of the issue is that this game has too much "bite size" content that's farmed over and over and over. I think the original intention was to have something that was not too large a time investment for someone with a short time to play. The problem is, they also decided to balance the drop rates against people who have a lot of time to play. That means people with a short time to play don't have a reasonable chance at getting rewards, and people with a long time to play have to do the same thing an absurd number of times to get their rewards. It's a lose-lose situation.Having more content wouldn't make the Darklight droprate more tolerable, it would just divide our attentions to the point where it would take even longer to finish our Darklight sets.
No content they put into the game is going to be fun and satisfying anymore after doing it hundreds of times. MMO content needs to be fun and rewarding at the same time, not a choice between the two. Right now, we have a mutually exclusive option between doing content while it's fun but not getting any rewards, or grinding the content long past the point it feels like a chore to get the rewards.