This is a hot topic on the wow/reddit:https://www.reddit.com/r/wow/comments/7xzsx6/if_the_horde_gets_the_wrong_side_of_the_stick/?sort=confidence
"Sylvanas is one angry banshee, she is a powerful ally when things suits her interests. Her motives are not clear. And she uses us, the mighty horde, to never going back to the shadow realm. She is a self centric and egotistical b*tch"
Nobody liked that she burned down the great "world" tree, she is a villian next expansion, wont be long till they get rid of her.