It's hard...because what else can they do? The content is outdated. Every so often, SE will incentivize the content (currently the relic quest). Players looking to do the relic will sign up for it. But otherwise, there is little reason to do them, and forcing people to do content is never fun. I suppose they could add a new incentive when 3.4 drops, or make aether oils obtainable another way in 3.45 when the next relic step is added.

Many people have completed relic by now or have passed this step, making it take far longer. As Archaell said above, people tend to do them more often on Tuesdays after reset.