It's a pretty blatant "whoops, we need to explain all the Ogres" thing.
That's an interesting if minor point. The Ogre predates the current form of the Qunari, and it’s anyone’s guess whether, originally, the Ogre was even conceived as a ‘tainted’ form of the Qunari, or just as, well, an Ogre. Maybe as simple as a tainted form of an Ogre-like species?
Things get rewritten and reorganised ‘behind the screen’ all the time, so I wouldn’t be surprised if originally there was no connection. However, once it became convenient, it became so, and they had to explain the presence of Ogres on the mainland of Thedas.
It might even be the case that the design of the Ogre influenced the final design of the Kossith/Qunari, rather than the other way around? If I remember correctly, while the relevant concept art is not available to us, early reports on Dragon Age suggest that what became the Qunari were initially conceived rather differently, as some kind of reptilian (draconian?) humanoid.
completely off topic but I just realised how big Orlais is, holy shmokes
I would temper my awe. The few travel times (DA:O, WoT) that we have can be used to calculate that Ferelden is about the size of Puerto Rico, or even a bit smaller. If we use that as a basis, Orlais would be smaller than some of France's historical regions.
I don't actually think Bio perceives Thedas as being that small, but they're awfully fuzzy about actual distances and thus the 'real' size of their world.
what i find surprising is that there seems to be more land on the other side of those mountains at the western edge of Orlais, have we heard of anything from the other side?
Not much, wasn't there something about the ancestors of the Rivaini (or at least the 'non-white' part of them) coming from somewhere beyond the Donark forest?