What DA:I does better than The Witcher3? A lot of things, in my opinion. Both, inquisition and TW3, were my first titles to both franchises - so I really have an neutral view to both.
I simply love the world of Thedas, Inquisition made me read a hundred articles because I wanted to know everything about this world! But I never had the feeling I didnt understand what was going on, it was very beginner friendly
In the Witcher, I was so lost and to be honest, the world looks like it could be outside of my window. Some would say realistic, but I prefer the different maps in Inquisition! I was so curious about every corner of the world.
Also, clearly the creative team is a lot better at biowares place. The characters were amazing, my heart is still broken about my romance with Solas, while I couldnt care less about Triss and Yen. Vivienne and Sera are also unbelivable well written, I love to hate them! And Cole, how perfect is this guy? In the Witcher there was like none Person who was kind of memorable (ofcourse, its just my opinion).
And last but not least the villian - at my first playthrough at Inquisition I had the impression Coryfish was kinda lame but at my secon play, I made the quest, in which you hear his voice-diary. And I had so many feels with him, that at least gave him a motivation (and a good one!) - while the wild hunt was...well, the game should have been called Hunting for Ciri - cause there was fairly any wild hunt. Never saw such a dull Antagonist...