a while ago i opened a support ticket to speak about the drop rate issue. The Answer from support team was that they know that ever since the rollback happend, nothing drops anymore from overworld mobs. They said that they are aware that its a big problem but since support team isnt really involved with game development they cant tell me when or how its fixed. But if they are aware i dont get why they dont say anything about it. I think it would help alot if the devs would acknowledge the problem and be transparent with players... this is like talking to a wall every wednesday