I'm very surprised you think that. I clearly felt the lack of atmosphere Dragon Age was. It didn't have any real direction, it wasn't D&D, nor was it really dark fantasy, it wasn't clear. It had a very unoriginal story, quite well done, but unoriginal, generic and very unoriginal settings, generic and unoriginal music (good music, that suit the game thou). All this together just makes the whole game feel like it lacks atmosphere. I have felt it a lot more in D2, and certainly in Risen.
I agree about the atmosphere in DA. It is a fine game, but everything feels utterly generic to me... whilst games like the Witcher, Divinity 2, Drakensang, Gothic, Risen feel unique to me. It seems that for what European developed games lack in graphical polish, they make up for it by the combination of unique art direction & memorable music.