Allow us to select multiple items (i.e. walls, or sections of towns) and "group" them to move all at once.
This would go hand-in-hand with a previously suggested "edit mode" so that it only activates when in this mode.
Pressing and holding one item, and then a secondary touch would draw a "box" around items you want in a group to move.
I'm sure it has been suggested before, but I didn't see it in the common "top" requests.

