I haven't seen the movie but I have read the synopsis. And those "that changed for the movie" you mention is probably the background information of Warcraft1 th

I haven't seen the movie but I have read the synopsis. And those "that changed for the movie" you mention is probably the background information of Warcraft1 that was added as flashback in Warcraft3. However, that was still a patch job for what was already written one dimensionally, hence still rather one dimensional despite the improvement. In short, what I meant as "based off warcraft1" is including the extra information from warcraft3, which understandably is still weak in story.