Bug

The hoppers used in gold farms can collect and distribute gold and rotten flesh to various chests for storage. Allowing a player to build more efficient farms is not an intended feature so I think hoppers should be removed. At least the functionality of them should be removed as it makes the game fun for collecting items en masse. It doesn't fit the vanilla feel. 

Hopper minecarts have the same effect and can collect drops my guardian farm. I don't feel like there should be a way to collect them it ruins the fun of diving into monuments to die several times for a few sea lanterns. I only needed a few thousand for my current build. I could have way more fun dying to guardians than building an efficient farm.