It would be nice if certain optional chests in the vale quests also dropped vale ingredients.
They could be chests that require out of the way effort such as the beholder, puzzle chest, or locked/trapped chest in Rainbow, the no spider kills chest in Sleeping Dust, and the devil portal chest in Running with the Devils.
In cases where there are no out of the way chests, the most logical may do such as the Troll chest in Coal Chamber and the Orthon chest in Ritual Sacrifice.
May cut down on some of the direct grind and encourage hitting extras for a purpose other than collecting vendor trash.