I almost never complain about items in crates but survival is all about economy. So when you use an epic key and get a villager spawner that you can't make money on, it makes you not want to buy keys again. They are useless and make no profit what so ever. So I would like to suggest maybe making the chances a bit more rare by 1 or 2% then making it so they drop emeralds or something that you can sell. Because to get a spawner out of an epic crate that doesn't make you money is kinda dumb. Many people feel this way, its just a waist of an epic key. Nobody wants to go through the trouble of finding the right villager to get 3 emeralds off of. In my eyes, the value of them is nearly 10k as they should be over 1mil. Especially if its coming from an epic crate.