There are some items that only drop one at a time. Like a few weeks ago I had a meltdown that I could only gather one Hippogryph Sinew at a time through killing, yet my retainer can get 7 in an hour. I could get more of them through an hour, but those monsters rarely drop them for me. Shepard wasn't actually a class that was mentioned in the game in 1.0. In one of the areas of Coerthas, there was a building that had the Shepard emblem on it with a flag. It was never implemented.