Glocon: This is maybe too much, but in Witcher 2 there was a such depht of field effect!
sariaen: It had a different level design. You did not see it as clearly as you can in Witcher 3. Heavy depth of field was used to create a blurry effect on the places unreachable.
Well, you may be right.
I personally would still give it a try in w3, because the very far landscape is poorly rendered IMO, with very few detail. A little bit of DOF could maybe help.
But another thing is that DOF created by a lens heavily depends of focus distance (farthest focus distance = least DOF).
And in W3, Geralt is much further from the camera than in W2, which leads to less DOF (in a huge proportion).