It would be great if one could predefine whether the "Add" or Move" option is checked by default in the import dialogue.
Now there is a risk that you move files when you import when you just meant to add them to the Lightroom catalogue.
This becomes a problem if you have already set up a folder structure for the images in another program and you just want to add them to the Lightroom catalogue, but if you don´t happen to notice the "Move" option is selected then Lightroom will move the images and destroy the original folder structure.