Currently, I am working on an update of the monster drops. Originally, I planned that this update is ready before the new crafting system, but I was rather surprised that the update came that fast.
Possible bugs: Drop of unfinished items, drop of non existing items (question marks), drop of totally unfitting items, no drop at all,...
Please keep your posts as precise as possible, general remarks ("Monsters should drop more swords") cannot be scripted