Before I get into this, I’d like to say that I don’t necessarily approve of what they did with Yrel. I played through WoD on the Alliance side, and I liked her. I wish they’d picked a different character to make into the Light Zealot—actually, the best solution might have been to create a new character for that, because all the prominent Light users on the Alliance side seem pretty popular.
But I’ve gotta point one thing out: Cursewords brought up the san’layn because he likes them and so their inclusion in Alliance-only content is kind of a sore point for him, but they’re far from the only example. Horde gets extra-villain-batted offscreen kind of a lot.
Just in BfA, there was also the assault on Brennadam(n), which was made as horrific as possible with the sole purpose of making Alliance players angry.
And then there’s the weird and disjointed story of King Grong and the gorillas. 