There is a lot of things you can do for DoL/DoH. One thought I had is a community building event where you harvest and build a monument, or wall, or something more interesting in a public place. You could receive exp, seals, and other rewards depending on your contribution. The finished product could reset every day or week.

I was hoping that the housing system would be a lot more involved for crafters and gatherers then it is, but we could still have building projects in the form of events or even fates.

Think outside the box and focus on community teamwork to get things done.