I have not read the said article and will therefore not comment on the quality of the editorial or photography.
In reading an article on any airliner type, the reader is bound to (consciously or unconciously) make judgement about the success or failure of this aircraft type.
A reader may have seen many different examples of this airliner, know of others but have not seen them and must be curious if there were other operators that he/she has not even known of.
As such, a list of all known operators / owners would be an attractive feature . . . sure it is not vital, but still nevertheless, an attractive and highly desirable feature.
Without taking a poll, we could all debate till the A380 is roll-out of the hangars in Toulouse what the majority thinks . . . but suffice to say that I join those who think that the absence of a list of operators/owners speaks louder than its inclusion.