It's not without flaws but I really like DA:I. For $20 it's at least worth seeing the side-character plotlines which I thought were great for the most part.
But yeah, like in most open world RPGs it's easy to put way too much time in needless and unfulfilling mini-tasks (and that goes for Witcher 3 aswell, since we're comparing the two, apparently). DA:I has tons of that stuff but it's easy enough to skip.
I would recommend picking it up for $20.