I don't think it's that simple. Diablo was designed to be repetitive (at least it seemed to me, it's a hack-and-slash game), and the levels are quite frankly b

I don't think it's that simple. Diablo was designed to be repetitive (at least it seemed to me, it's a hack-and-slash game), and the levels are quite frankly bland in comparison to Skyrim, not to mention it's played on third-person view-from-above tiles. Is anyone aware of randomized level design in a first-person game? It seems like a much more challenging task to get right. If you want to avoid repetitiveness at the scale of Skyrim I'd guess you would need reusable assets on the scale of pieces of a tapestry, and creating unique dungeon layouts would be extremely difficult, as they need to be designed to hold the attention of the player. I believe it's difficult to create artistically interesting and attractive layouts randomly without reuse of large pieces of dungeons (the main pain point in Bethesda's modular style).