Lore. You dismiss it too quickly, it's the main reason why they made it a sequel. From the moment you finish Origins, it's clear from the epilogue that the developers hope to continue the story of what happens in Ferelden, and at the epilogue of Awakening, it's clear that they want to expand to somewhere else in Thedas. The choices and effects your characters had on the world can be imported from DA:O, but even if you don't do so you have the chance to explore more of the world and the lore of Dragon Age.
Krantos said:
My argument was that the other elements are so drastically different that it should have a new setting. My statement about the world was there to say that the setting was not distinct enough that changing the names of things would change the experience or story.
For the same reason i play Kingdom Hearts on significantly different platforms (and usually with drastically different mechanics, like Chain of Memories and 358/2 Days) and swallow anything with the Star Wars label that piques my interest, i will buy Dragon Age 2. I have experienced Star Wars through just about every conceivable medium (And in gaming, throughout several different genres), including novels and videogames. I do it because i want to expand my experience of what can be done with the fictional Star Wars galaxy.
Your argument is that DA2 should have been a new IP because the game was so drastically different from DA:O, and the world in itself is so generic that it wouldn't make a difference if it was a different world.
So what? Star Wars started out as: young farmer boy meets mystical mentor and teach him about his powers, so he can go save a princess and "fulfill his destiny" by destroying the evil oppressors (how many times hadn't that been done?). But with the survival of Darth Vader and the Empire as a whole, we knew there must be more to it. And there was! A ton of new stuff. It turns out Lucas had actually started the story with this premise: War hero succumbs to his own darkness, but his twin children grow up to oppose him and ultimately save him from himself.
My point here is that you shouldn't dismiss DA just because its "another medieval fantasy", because for once the people who created the world actually care about it and are willing to use it to create interesting personal, political, and legendary stories within this world. And the point about how drastically different the game is not only irrelevant (as i explained above how method is irrelevant to presenting the same lore), but somewhat false. Yes, major changes were made, but they changes to areas of the game that could use improvement. But at the end of the day it still FEELS like Dragon Age, because that's what the developers wanted to create, despite the changes. (I have only played the demo, if the experience in this respect is significantly different in th full game, then i'm sorry but i wouldn't know. I highly doubt it though)