Killed the story. Azeroth dying is just an afterthought. It got saved 100% without her champion even helping. Every patch we saw the chamber get better without our doing anything to contribute to that fact.
Allied races were shafted. We got 2 added for the entire expansion and all we got was some excuse that holds no weight about how they will be added when the story makes sense.
The war story culminated it Sylvanas dipping out without any real issues and with literally no one stopping her. Thrall and a slew of others were there and they did nothing to try to stop her. Just watched as she killed someone.
Over all, poor story and poorly handled the allied race feature.