I’ve been arguing against the Alliance in here a lot, but I’ll admit, I agree that the Horde does need their Teldrassil. But it needs be that. I’d rather not get into losing more cities, but I would welcome a massive defeat if it was done right for the horde. Right now only the Alliance has any reason to see the other side as an existential threat, and if we aren’t going into a new frontier with the factions next expansion, I really think that the horde needs a reason to look at the Alliance as a threat.
Let the Night Elves loose in the forests, let them be the horrors they were supposed to be to those that set foot in their lands. Have the Alliance forces better suited to flat out battle hammer a horde army trapped between death in battle and death from the trees.
Let them be ruthless, let them come with hardened hearts to cut down the monsters. Give the horde a heroic last stand where they fight and fall on their own strengths, none of the super weapons that we’ve had to rely on for the story to let us get a win. Let the Alliance win the fight, let the Horde player be in charge of leading out reserves, or trapped civilians who were caught in the fight so that they can pass along what happened.
If they’re not going to have us come together as one in the next expansion, and least let the horde have a reason to think of the Alliance as a threat.