Board Thread:Dark Souls/@comment-25294282-20170316195001/@comment-4511886-20170316225423

It might've merely been about time constraints. The game was rushed, as seen with some areas of the game (namely Lost Izalith) as well as the fact that the Artorias of the Abyss DLC was originally intended to be part of the main game.

It might be something else entirely, of course. This is just my personal theory.