I don't know, maybe you are right. But I love to also believe that Fallout New Vegas has shown that even the casual market, can take depth. At least as far as role playing goes. A tight and well done narrative doesn't have to be super complex though. Just well writen. But some depth here and there, can't hurt either. Complexity can come with player interaction, motivations. Like Benny or House, simply because they give you many ways to interact with them. You can kill Benny, you can help him escape, you can let Ceasar kill him. And there are many more nuances between that, Like if you chose the Black Widow perk as female. And you have many options with House, Ceasar, the Legion and the many other NPCs and factions. This gives the game really a lot of depth. But the best part is, it's all optional. I like to think that if Obsidian had the resources, time and marketing of Bethesda, they could have sold as many copies with Vegas like Fallout 3. And they would be now selling Fallout 4. As a true role playing game.