One big thing I'd like to be able to do is have the option allow a user to mark one item in the list of Assets as primary/default and/or be able to pin items to the top of the list.
Also, it would be nice to select/deselect "Show in List" for all the Fields at once in this menu rather than having to go to edit each field individually to select it.
Also from this menu, have the ability to arrange the columns in the list, set default sort option, possibly combine fields (addresses for example.)