The title of the 'Prepare To Die' edition plays up what the game's known for, of course, and this expanded version is the result of PC gamers clamouring to have a game like this on their systems. There is much that has been complained about: the locked resolution is one example, which has almost instantly been unlocked by an enterprising neogaffer. Other demands, while desirable, are not realistic, because they would have required From Software rebuilding the game entirely.
In general, the arguments are wearying and all that needs to be said is this: Dark Souls: Prepare to Die Edition does not come with the technical options you would expect from a well-engineered PC game, because it's a port of a console game, and that's all From Software ever promised to deliver. Anyone who passes up Dark Souls for this reason is cutting off their nose to spite their neckbeard of a face.