When dropping like items, it would be nice if they would automatically 'snap' into a single pile.
This can be accomplished now by standing in one spot and dropping, but if you need to drop more later on, it is a real challenge to get the next stack to match exactly, unless you picked up all the original piles first.
For example:
I have 5 stacks of 250 cherries. If I drag and drop them within, say 50% of the width of the original stack, they would automatically just drop exactly on top of what was already there.
Glum also mentioned this might be a good way to reduce graphic lag since it could be used to draw just 1 cherry, instead of multiple stacks all offset by just a couple pixels.
For those of us/you that need the fine control for item "art", this feature should be able to be turned off and on at will.