I think it would be a good idea if you would provide a few additional example sentences for each word that is learned. Also, including the same words in more practice sentences could be a good idea.
Hear, hear. I second this suggestion.
Seeing the words in different sentences could make them easier to recognize later on.
Assuming it roughly takes the same amount of man-power to add a new word to a course or create another example for an existing one, would you rather have three times more words to learn or three example sentences for every word in the course?
More examples are good. however, if it comes at the expense of adding new words, I would prefer more words.