Hi, Magnive here, i know some of the stuff i write sounds a bit unreal, but i would just write why i think that should happen.

Qi'raji with Alliance

They could very well be mindcontrolled since C'Tun created them.

Iron Dwarves with Horde

Since the horde was warned about the upcoming war, they wanted allies, and the Iron Dwarves was a good choice, since they knew Yogg-Saron Too, the thing with having them imhabiting the Dalaran Crater, i think its fine, because the playable Dwarves and the Dark Iron Dwarves live underground, so why not the Iron Dwarves.

Loa Worshipping

When people saw the Titans, and when they had the Knowledge of the Old Gods being alive, they could very well worship gods and so.

Old Gods free

A lot of magical stuff had happened in the last years, Opening of the Dark Portal, summoning of the Legion, Archimondes death, The Eye of sargares was used and destroyed, Lich King and Arthas has been fused and the Dark Portal have been opened.

The only way the titans could have sealed the Gods was with magic, so with so much magic activity, they could have used it or absorbed it and broke free in that way.

Ysesa Corrupted

The Gods corrupted Deathwing, so why not Ysera? Too, 4 of her leutenants was corrupted, so they should be able to corrupt her too.

Just write if there something u think is unreal, and ill try to answear.