I mean I am slightly upset with the decision route of the character but I still enjoyed the cinematic for what story it did tell. I liked the Jaina one more as well but if you took away the song i'd have liked Sylvanas' more probably.
I think that's the issue with a lot of people, granted I am attatched to Sylvanas as well but will I dislike a cinematic over portraying her negatively? Nope. Personally I am excited to see where her story will go from here.