I feel like this entire zone makes zero sense in the current lore.
Wowpedia claims that the zone has been ravaged by arcane magic from the nether, and that the manaforges use arcane magic as fuel. They're also described as harvesting, "the chaotic magics of the Twisting Nether" . This is also how it was described in the old TBC web page according to the wayback machine: as a region destroyed by chaotic arcane magic from the nether. I'm sure the quests describe it this way too.
Arcane mage mobs in the tempest keep dungeons (cant remember which one) are referred to as nethermancers. There's also "arcane vortices" that appear in the zone, described as wormholes where "the Twisting Nether's very essence appears because of the magical tears in the broken world of Draenor." What does the arcane have to do with the nether in the current lore? Shouldnt this all be fel stuff? Wowpedia claims the nether formed from a clash of light and shadow, and I suppose that clash creates fel magic? so why is this zone so heavily arcane-themed?
Furthermore, the arcane is a force of order, so why is Netherstorm the way it is? Shouldnt exposure to arcane energy make the area more orderly? How did it go from a peaceful forest to such a chaotic mess?
Look, I know the simple answer is "retcon" but where does this leave us in-universe? Is this entire zone non-canon as its currently presented? What is "actually" going on in this place according to the current lore? Should we just pretend it doesnt exist and move on?