I don't agree with that turn wheat into bread, because that's not part of the realistic in this game. You can't just "burn" wheat and except to get bread like charcoal from trees xD
But i would agree over a special "prioritizing drop list" which you can at least closely control which items/drops they should focus on first (or at least most of the time). This doesn't mean that you can control what they do like cutting trees, but what they will collect first like bread from the oven.
Like i already mentioned a few times, sometimes the overwhelming count of items/drops are blocking any progress.