in my opinion a box should not give a reward that is a lower tier box. thats just a punishment of getting the value of the box back and having to deal with at times an excessively long cooldown when your diamond box manages to lower itself all the way to bronze
I nerfed basically all item cooldowns because in earlier versions it was too easy to just idle farm for a night and then constantly spam the items during a boss fight. In a lot of cases, it trivialized the progression you made with your raiders and made it all about farming enough items for a boss fight. Consumables are still very important, and there will be additional mechanics added in the future for other things that you can do to prepare yourself for a raid (for example: farm buffs from certain enemy types), but I want to strike a good balance between the various aspects. Of course, this is also a balancing issue so I might change values again in the future.
 "Press The Button"){kind=icon}
 "Aground"){kind=icon}
 "Till The Next Floor"){kind=icon}
 "Slurpy Derpy"){kind=icon}
 "Frog Fable"){kind=icon}
 "Idle Raiders"){kind=icon}
 "Tangerine Tycoon"){kind=icon}
 "The Enchanted Cave 2"){kind=icon}
 "Idle Chat 2"){kind=icon}
 "Whack the Thief"){kind=icon}
 "Strike Force Heroes 2"){kind=icon}
 "Cloudstone"){kind=icon}
They only eat dirt. In fact, they move up/down mostly to avoid eating ore.