While i, and i would assume most people (at least the handsome ones), would prefer hand placed loot, it is a time consuming thing to do for every enemy.
Random loot is usually done to save time and money, even if the official party line is "increasing replayability".
Considering that they have a relatively small budged for a game of this scope, i think something like this would have had to have been a priority from the start, and would probably have ment a cut to something else.