Loot Crate System

[Kratos]

This was lingering in my mind for a while now, thought I should share it with you guys. Often times people complain about not looting enough, unrewarding loot system and game getting boring without loots, which they are right to complain in many cases. I figured the famine in loots can be removed, or at very least, reduced by a loot crate system. Basically every time you complete a run you are guaranteed to get a loot box, depending on the type of the run you have completed you get a different box, in which you can loot low and high tier crafting mats, legendaries(idk if it will break the game, it probably will, so it's better if they didn't give any orange/red items).
I don't know what can be done against wave 12 joiners in this system, maybe you get a crate if you join from wave 1? how about innocent wave 3-6-9 joiners? Discuss.