Impossible to use only "move" in the page field definition

If for instance I do not want to loose those pages, whose parent(s) will be deleted, I could for instance somewhere create a temporary page-storage container, which has a page field and only make the "move" option available for the field. This is currently not possible, as when only defining "move" all the options are still available.

The same goes for linkonly,external - which does not really only display the external links entryfield.
Also 'linkonly,internal,notitleoverwrite' does not do what I want, "notitleoverwrite" is not implemented yet.