The warfronts were won by the alliance, as was the naval war, southshore too i hear.
But Lordaeron? The alliance ploughed it pretty badly, and afterwards it got blighted too, so i'd say it's no-one's land now, perhaps the Scarlets or some scourge leftovers now hold it?
Teldrassil too is completely gone of course, but Ashenvale... well i'm not sure, but i had the idea that Night Warrior Tyrande made it a fairly wise idea to avoid any historical night-elf lands apart from maybe Azshara. Add to that that they seem intent on claiming a capital and i think it's fairly clear that the night elves will go for Hyjal. Likewise i expect the forsaken to take up residence in Stratholme, which has all the trappings of a potentially very nice capital.
But in the end the war did end in an armistice, though mostly because of N'zoth.
However given that the Alliance made clear gains and inflicted devastating losses certainly no lesser than the Horde's i'd argue that the Alliance still "won" in so far as an armistice can be won.
After the battle of Dazar'alor the horde was weeks from being overrun according to in-game sources, and while Anduin's assault on Orgrimmar stated that this was the last assault he could muster i am strongly inclined that this means that this was the last of his expeditionary/local forces, the ones who regularly get sent out for war, implying that the alliance's defenses might have been largely left intact (it would furthermore reinforce the idea that the Horde was making a last stand at Orgrimmar, making it a combination of its army's remnants and its local defensive garrison tha created the advantage). It should also be mentioned that at that point he no longer had the obedience of the worgen and the night elves, so he might have counted himself even poorer than he was.
Though i liked that they really did involve the allied races i was sort of disappointed that no mention is made regarding the fate of Shadowforge city, Suramar, Thundertotem and the Vindicaar, each of those locales could be excellent places for battles and other interesting happenings.