Balketh

Like most gods, the Daedric Princes do have their inscrutable limits, and Vekh's later-but-always CHIM realisation makes him always difficult to deal with, so I can understand Azura coming at him from a place of real guilt worn into him over time, like water over stone.

As for the Blight stuff, that was how Voryn went basically from the get-go at the culmination of the Battle of Red Mountain; his corrupted inverse realisation of the godhead through his manipulation of the tools tethered him to the heart, and without protection or knowing, his desires were corrupted in such a foul way.

They wouldn't have to change too much about the game's general progression and Voryn's purpose as a big-bad-boss, but I think an actual representation of the absolute insanity of an in-progress Dragon Break, the magnitude of the power at play in the Heart, the actual threat of Numidium alone, let alone Akulakhan born of such a selfish view of the godhead, would go a long way to shaping up the ailing back half of the MSQ.

Emotional attachment and history between Nerevar and Voryn in playable segments would also help to connect your Nerevarine with Nerevar himself, it would make the discovery of Foul Murder even more impactful, and give the player a direct reason to want to go against the Tribunal later on. Even that gets given more depth, as we would get to see Almalexia as your wife and confidant, Vivec in his pre-post-always-CHIM-prime, and even a hint of who the fuck Sotha Sil was, let alone deeping the emotional impact of Voryn as your brother-in-arms, your general, your friend.

A gruelling and gripping narrative of the broad and inscrutable cruelty of the Daedric Divine, of betrayal, of the closest bonds being torn apart by the ways power and context manipulate our choices. To come face to face with dear Voryn, who has never slept a night without thinking of your return, of sweet, loyal Voryn who waited, and waited, and waited, and when he finally could act, to prepare Resdayn for your return through his most cunning plans and clever sorceries, who took up the mantle of leadership in your absence, but deep down, only temporarily...

Only to find you oppose him, because he won't just stop at Vvardenfell. You might even agree with him academically, or morally, or ethically, but it cannot be. Akulakhan is being made to rule over all, and that is no different, in any measure, to the Empire, to the Aldmeri, to all who vie for dominion. To have to cut down your dearest brother, who wanted the best, in his heart, for all your peoples, but whose mind could not withstand knowing the Truth, and fell into dangerously deep ruin.

Now that's something I wanna play.