Garona was an half orc (she gets called half breed in the movie), and was like that before the movie was even in the work. (Iirc they don't mention the other half in the movie but we know it's half draenei in the lore)
The movie actually did a great job at respecting most of the lore and visuals, and it's chokefull of Easter eggs for the ones versed into it.
Honestly i just looked it up and i scratch the 'doesn't make sense' part because for some reason I had it in my head she was half draenei and still came out looking like that. Still stupid that they had to throw in a sexy orc but whatever. That movie had many other huge issues.
In the end the most enjoyable parts for me was when the guy flew into stormwind and actually went to the FP and when they went over the bridge and you heard a murloc
It's not addressed in the article, but I assume this must be rendering quite slowly, not in real time. Still, it's impressive that a videogame engine has the fidelity required for film.