Bioware RPGs are very good at exploring the mechanics of privilege and prejudice. One of the best ways in which they do this is that they use fantasy/sci-fi races, meaning that the player has no prejudices going into the experience. If you, say, made a game about how black people are being mistreated in America, many would reject it, because that narrative doesn't match with their prejudices. Look at how many homophobes criticise Bioware's inclusion of gay characters, even though no bioware rpg ever has forced players into gay romance storylines. But nobody have the same criticisms for, say, the Asari in Mass Effect, because those things do not exist people have no pre-existing notions about them. People can see the mechanics of privilege and prejudice without being clouded by their prejudices which they hold in real life.
One of the reasons I played as non-human characters is that you really get to see the other side of that. Most of us who are playing the game have grown up in affluent countries, generally safe from war, and even the minorities of us have it better than most of the world. We don't know what it is like to be a slave, or to have suffered the genophage, or to live in an circle or an alienage, or to be a surface dwarf, because almost all of us are so far removed from whatever could be considered analogous in our world due to our simple ability to be able to afford the luxury of playing the game.
This is why the lack of origins in Inquisition disappointed me. Because, in Origins, you really got to understand your position in the world, and the unique worldview of your people, along with their place in the world, before you got on to the whole save the world stuff. And when it was time to save the world, you had to interact with different cultures with different political systems, who would all react differently to you depending on your origin. In inquisition, the race question is basically an aesthetic one, because apart from a paragraph of text there isn't anything in the game which contextualises the races and cultures of Thedas before you are thrown into the world. In dealing with the world, we mostly deal with humans, and those non-human societies are mostly either insignificant or ill-defined compared to Origins (see the Dalish in the Exalted Plains and Brecilian Forest, for example). For those of us who have played Origins, we already know about Dalish elves and Surface Dwarves. But for people new to the game, the choice is essentially short and stocky, tall and muscular, skinny or normal. If we are to play as new characters in DA4, then bringing back origins is pretty much on the top of my wishlist.