Because the option "Reorder members" is only available to the entire file, it would be good to have the option "Reorder selected members" in the context dialog when a contiguous range of nodes is selected in the list.
I just reordered 40 properties on a data member by hand using File Structure and could really have done with this ability.
A colleague suggested copying the members to another file and reordering them there, but only after I'd finished 