Significant parts of those expansions were also heavily done in favour of the Horde faction in terms of what content was completed.

Cata: Goblins had so much work done on them the Worgen got nothing after their starter zone despite the plans for Silverpine. Later on the Horde intro to the Twilight Highlands involved an encounter with Deathwing while flying on a fleet of airships. Alliance got a shitty cutscene of Flintlocke flying off into the distance before a fade to black.

WoD: Dealing with the fallout of the latest Horde fuckup the story was mostly a "What if?" retelling of the Horde prior to Warcraft 1, except they were just as genocidal as when hopped up on demon blood so that wasn't an excuse anymore. Still, most of the events dealt with Thrall tracking down, then executing, Garrosh. Fighting and killing various famous faces from Horde history. Then the emergency asspull that was demon infestation 2: Hellfire Peninsula Boogaloo which ended with a fight very similar to a TBC one because the devs didn't want yet another Ork finale raid after SoO in MoP, and by that point the WoD had been shelved to make way for Legion.

BfA: the first raid was so badly connected for the Alliance they kind of just were there. Meanwhile Horde had an entire zone story leading up to it. This was the expansion which had the Horde turn genocidal yet again, for the fourth time. 🙄