Inquisition does take a lot of the choices from the previous games into consideration for the lore and world state. But I also do think that the world of Thedas is much better written and well thought out compared to ME's.
Yeah but it takes the stance of being far away from most of the choices.
When you are doing a direct sequel, thats not really possible.
Inquisition is able to ignore if you aided the werewolves or the elves, bhelen or Harrowmont.
That will not affect the main history whatsoever, only the war table missions, which are a nice touch since it keeps old players happy about their choices, while not having to spend too much resources into variables.
Being able to ignore the Rachni queen in the mass effect series for example, would prevent that horrible excuse bioware gave of the "evil close queen".
TL;DR If your sequel is not connected directly, you are able to distance yourself from previous choices and that will save you the headache of having to do cheap solutions