For example, there are some areas where Gun Puppies are on platforms that a player can't access. When you kill them they drop stuff (yay!) but you can't obtain the stuff they drop (gah!).
It would be nice if, once you kill all the enemies in the immediate area or something, paths open up that allow you to walk over and collect your spoils.
Or give us all a vacuum pack that brings all the drops in a radius area to us. Have it take a while so people aren't temped to use it in the midst of battle.