Sure, but it'd be a lot cheaper and easier to make than a full on sequel, it would function as fan service for those still not over the ending of ME3, and the urban areas of the milky way would probably provide more compelling maps.
Also sure beats the hell out of a video or audio log.
That it does.
If the story and original setting absolutely must be abandoned, then I would appreciate such a gesture, I never denied my wish to see proper closure for my surviving Commander, and I do think it would be deserved in some sense.
I just don't think they want to go there at all, unfortunately, for the same reason they don't want continuity.
It's like, of all the promises, the one they hold most high is that the trilogy was a self-contained story and that it is over.
It's finished, over, finished and done with... https://youtu.be/49GYGGoi6iM?t=2m3s Over.
Why though? I have no idea.
So I guess because Dragon Age visited Kirkwall and parts of Ferelden and Orlais, the continent of Thedas is now boring and pedestrian and we should "move on" to new lands? 
It would seem that they're sort of treating the difference between galaxies the same way as the difference between countries.
It's a bit silly.
That's where sci-fi goes off the deep end.