Don't hate it for what it's not.
Does that mean it sucks? No. I'ts way deeper than the Diablo games, and no one complained about them. It's an action RPG with a decent story - in fact the combat is very fun. If there's a complaint it's that there's a lot of exposition before your get to the combat, which slows things down.
Now: the haters who are saying this game is a 1.0 or 2.0 are just full of it. This game is better than 90 percent of the games that come on the ps3. They're just fanboys whining that it isn't a true extension of Origins.
And that's a legit complaint, but that doesn't make for a legit review. This is a different game, it's action RPG. The demo gives a good idea of the game play, try it and decide for yourself. Ignore the fanboys.