Once again, despite all of this, the Alliance got an extremely favourable outcome due to Greymane's instinctual reaction. Leaders shine in extraordinary situations; his decision turned out to be right in every sense of the word and his instinctual call and orders proved to be right. The Alliance would've been doomed had he allowed Sylvanas to chase after her own selfish goals, while pursuing the greater goal of defeating the Burning Legion. Varian did exactly that and we all saw what the outcome was. It would actually be extremely stupid for any Alliance commander not to go after Sylvanas at this point, seeing as she and her undead have turned out to have their own selfish and secret motives every single time.
As a Horde player, I was stunned by the obscure role Horde forces play in Stormheim; at least the Alliance champion assists Greymane in getting revenge for Gilneas and over what was percieved IC as outright betrayal on the Broken Shore. The entire plotline for the Horde revolves around finding Sylvanas and assisting her undead boyfriend in finding her, while she is scouring vrykul lands like a runaway teenage girl over her own, selfish aspirations, completely ignoring the fact that she is now responsible for countless races, lives and an entire faction as the Horde's new warchief. You then find out that you - as an orc, troll or tauren - assisted these undead folk in doing nothing for the Horde, while also completely failing in their own selfish goals too; it was a complete disaster. At least Greymane went after someone who wasn't trying to fight the Burning Legion in the first place, saving the Alliance in the long run and the playable character has a sense of achievement going on, which will be felt across the plotlines of entire expansions that are to come.
Another problem is the way Blizzard writes questlines up, then removes parts in the end or scrambles things up, leaving only half the story for us to play through. The order of the zones in Legion was completely messed up, just like the purge of Dalaran got messed up and important pieces of the questlines there got taken out, leaving players to wonder what the hell is going on.