My second is because that Dark Souls felt like the polished version of Demons Souls graphically and game play wise. That alone bothered me for originality concerns.
My last fear was repeating its shortness and lack of more optional areas. Repeating the same game after the NG+ curve got tedious. It stole from how epic it used to feel for most bosses. Another short play through version would definately shorten interest quickly given the memories of the grind for PVP classes in Dark Souls. Would it kill them to make a maze level where a dark wraith spawns above to start and can open and close pathways as well?