Dunno about that, the storyline and writing in dragon age is pretty average and by-the-book in my opinion. It's the weakest part of the overall package to me, the best being the character interactions / characters & classic party-based game play.
I think the game deserves determent points, for playing it to safe in regards to the storyline, but giving it a 5 for just that, is absurd. Because of how well-made the overall package is, in terms of polish.
Bioware also deserves props for putting alot of effort in the overall setting, even if the universe isn't the most interesting of settings, it has a lot of detail and effort put into it.