If it's possible to have a new permission that allows an acq user to cancel items and subsequently have real copies auto-deleted, but *not* affirmatively delete other copies in the catalog, that would be my vote. I'm a little leery of handing out DELETE_COPY to acq users just so they can conduct normal business, when that also gives them abilities that I wouldn't necessarily prefer they have re: other holdings in the catalog.
If it's possible to have a new permission that allows an acq user to cancel items and subsequently have real copies auto-deleted, but *not* affirmatively delete other copies in the catalog, that would be my vote. I'm a little leery of handing out DELETE_COPY to acq users just so they can conduct normal business, when that also gives them abilities that I wouldn't necessarily prefer they have re: other holdings in the catalog.