No, because a real fan of the story wouldn't tell a bad story just to paint their preferred group in a better light. They'd do everything they can to write a good story if they want to highlight their favorite group. A good story that doesn't demean other groups in order to build up the favored one.
If you're a real fan, you don't just want your favorite group to be the best of all everything no matter how convoluted the writing is. A real fan doesn't just look at all the flashy lights and go "oooo Khadgar and Kirin Tor is strongest mage cuz nobody else does anything like he does and can't do anything without his help, yayyyyy" A real fan respects the story, and doesn't like seeing it dragged through the mud with contradictory writing that ignores established lore solely because the writers want to paint someone as a better diplomat, or more loved or respected than they should be, with no explanation (Khadgar everywhere, Kirin Tor when Aethas licks their boots to be allowed back as a mistrusted second-class citizen rather than be respected and valued in Quel'thalas, Silver Covenant in Thas'dorah scenario where we're expected to believe that the Farstriders respect them and Vereesa enough to be her lapdogs, etc).
Personally, I wouldn't have minded the blood elves going Alliance in MoP. It would have been a very interesting new spin on their story that would be a sufficiently major enough event to give them some very detailed spotlight (like Khadgar and Dalaran get) on the level of several questlines going into what they're doing, what other characters think of it, how they're reacting, etc. Like Vereesa, or the rest of the high elves who now have no wall between they and their kin, allowing the lost sheep to return to the flock welcomed with open arms. I would love that story so much, seeing old family members reunited, working together on the same side, mending broken fences, perhaps even getting an update to Eversong Woods, Ghostlands, and possibly a phased version of Quel'danas (so the Shattered Sun vendors and the Sunwell dungeon and raid can stay). But I doubt the Silver Covenant would be allowed back, unless Lor'themar were feeling very generous and very forgiving, or Vereesa finally gave them a huge important good reason to consider her trustworthy and loyal enough to her homeland not to go on a murder spree, screaming "muh Rhonin!!!"
I don't really care much about the Horde as an entity, ever since Cata. Thrall (and Cairne) was the heart and soul of the New Horde everybody loved in WC3, embodying all its most treasured values of redemption, brotherhood, and rediscovering of their shamanistic roots so the new generation could give back to the world that their parents did so much damage to. And once Warchief Thrall became stupid-shaman-Go'el, the Horde lost all its former identity and Horde players were forced to play the violent asshats for like 4 years, with pretty much every zone outside your race's 1-20 areas' quests appealing only to those who enjoy the warmongering orc lok'tar ogar stuff. But not the cool lok'tar ogar stuff like Thrall's Horde did. The just plain stupid throw-everything-at-them-and-be-cannon-fodder type of lok'tar ogar.
Like, most questing areas passed 1-20 felt appropriate mainly just for orcs and humans. Many times, I found myself being like "why does my blood elf character care enough about this? Why is he taking part in Nazgrim's pep talk on the boat to Vashj'ir? A blood elf would be more likely to just hang back or spend their time in their cabin/hammock while waiting to arrive at the fight so they can help the Horde win and go back home to Quel'thalas."