The part I really don't get is the economics. Bethesda has a HUGE investment in the base game. All the coding resources, art resources, etc. that went into the base game were not cheap to create. When you compare the level of effort to create DLC, and I'm not just talking about bigger stuff like Dawnguard or Dragonborn, the cost/benefit for DLC has to be huge.
For example, if the base game costs $60 and DLC costs $20, that means that the effort to create the DLC was 1/3 of the effort to create the main game? I doubt that was true. I'm not saying that it took a lot of effort to create something like Dragonborn, but 1/3 that of the base game? So, why not just have a smaller team continue to turn out small(er) DLC for a long(er) time? Like maybe until the next big release that will turn everyone's attention to the next-big-thing. Skyrim still seems to be popular, so why cut off the DLC (and money) now?
Maybe someone can explain it to me, because obviously I slept through this Business 101 class.