Oh boy, there's the redemption arc nobody saw coming. Can we move on now?
I don't absolutely hate it and I have to admit the style of the flashback portions is extremely nice, I wish the entire game lookedl ike that. It's just, I wish they wouldnt've pretended it was something more than a split personality.
I think a big point here was that it was Sylvanas. She has to contend with the fact that both of those people were her, that's the entire point of Uther's spiel.
Not saying it's good writing, but 17 years haven't been invalidated, more like recontextualized. She's still the person who did all those things.