Increase reward and cooldown of unlocked world chests. Regarding the static chests (treasure chest, armour rack, weapon rack, resource cache etc.) Right now these are so worthless as to not even be worth the channel time to open them. A pretty harmless fix could be to simply 10x the reward and 10x the cooldown. Further scaling could apply to red areas compared to blue and yellow.

In a world with daily tasks, I think something as strong as 100x and a daily cooldown could work quite well too. This might make doing daily runs around the world worthwhile -- more players out and about!