Like many other software tools such as Adobe Photoshop or PowerPoint you have the ability to hold down Shift and move items along a vertical or horizontal axis depending on which direction you move it.
Add this ability to moving around items in microflows and nanoflows, this will save some time trying to organize it by trying to get it to snap to other elements.
This will make it easier for developers to create clean Microflows and Nanoflows, and save time on moving around activities to make the flow look clean.