Nautilus allows a user to drag & drop files only into the directories shown in the left pane. If a user wants to drop the files into sub-directories, it requires multiple clicks & selects
   1) Click & select the files to move/copy
   2) Now right-click & choose "Copy"
   3) Click on top-level directory in left pane
   4) Again, double-click (by default) on sub-directory to open
            ....... repeat down the heirarchy ........
   5) Now right-click in required sub-directory
   6) Finally, move down the menu and choose paste (or goto keyboard & Ctrl-V)

As opposed to this, the windows method of sub-dirs opening up as you hover over with left-button down, allows user to quickly navigate down. Can we get Nautilus to adopt either this or some such behaviour that reduces the no of clicks?