Originally Posted by
Super Dickmann
At the end of WC3, the orcish story was done. Thrall was an unquestioned Moses figure who'd already solved all their problems off-screen. Durotar was not defined as a shity wasteland so they had no resource deprivation. Their problems with the night elves were solved by the handshake arrangement afterwards. Jaina was fine with them and the only humans were a continent away. Their allies had nothing to clash with them about because they were the same as they were and had no mutually exclusive interests. This leaves three stories with an internal element - taming the land, done in TFT, dealing with orcs who were actually involved with the Legion, unlike Thrall - done in RoC through Grom, who's now dead, or fighting humans who were strawmen who didn't understand that the orcs were now goodies - done in TFT through Rexxar.
Everything else can only be the result of an external force showing up and kicking them in the balls, causing them to react out of the goodness of their heart. There's a reason the Alliance have an actual story with bosses like Onyxia, Rag and so forth, while the Horde, per the text itself go there solely because it's a nice thing to do - there's drama in one and none in the other. The only equivalent ongoing storyline the Horde had in Vanilla was the Forsaken's nemesis in the Scarlet Crusade and the Forsaken themselves were bolted on to enable conflict, one of several such means, like the Warsong Clan and the need for lumber which were alien to the WC3 setup.
Without retcons, from Durotar's status to Thrall's racial guilt, to the addition of the Eastern Horde races there is no conflict, internal or otherwise and ergo no story. The WC3 Horde is all fine in the context of its own complete story but there's a reason it's relegated to a bonus campaign with no impact on the overarching plot in TFT and that's because it has no hooks to anything. The only thing that exceeds its status as a storytelling wasteland is the post-Anduin Alliance and for much the same reasons - perfect leader, complete material satisfaction, homogenous allied cultures.