Dragon Age world is not Tolkienesque. It's actually really, really dark.Well, dragon age seems to be an epic fantasy (a tolkienesque one), while after the darker fantasy of GoT and TW i got to dislike this more colourful theme, for the fact that I like rpg genre and that DA:I got positive reviews, I'll get him a chance even if I buy it only after about 3 months (I really need to finish risen 3 and dark souls 2)
It's full of racism, opression, social issues which don't have easy solutions, betrayal and backstabbing, power abuse, slavery...
And there's always the demon and Darkspawn threat, which is pretty much constant.
I'd say it's as dark as The Witcher world, albeit in a different way.