Curt Swan did take a lot of short cuts. Notice how so many of his faces look the same, I started to notice that the same faces kept showing up in character after character while looking at my showcase books.
Take a look at the Legionnaires Mission Monitor Board -- I assume they are all by Swan:
http://members.shaw.ca/legion_roll_call/legionnaires/Except for the hair styles and some subtle variation at the jawlines, most of the male Legionnaires have similar facial features.