Look, here's my big concern with uttermost: Hunger's wife and child. Unmitigatable Tyrant means he's going to have trouble being a good husband and father, and that means No Happy Ending.
Ever.
The other drawbacks, I could work with. But unless Cut Through actually provides a solution to "Tyrant can't be mitigated", it shapes the story into a tragedy, and that's not what I want right now. Real life is too stressful for that.
Since we have confirmation that Hunger's Soul is actually a better afterlife than what's otherwise available, let's please take:
[X] The Ring of Power - Inheritor
[X] Fierce Quickening
Between Inheritor and Ruling Ring, I bet we could unlock an option to become a really good afterlife for everyone we kill, including via Decimation. Heck, I bet we could bleed them back out like that dragon we killed! In the more immediate term, it gives us by far the most powerful effect of Vanreir's - his aimbotting hitscan. And storywise, it gives us a happier, healthier arc for Hunger to follow - the hero who keeps the ghosts of his past with him, promises to do better, even befriends some of them. A healing hero, rather than one who's still feeding everything they can to the fire.
In more referential terms, let's imitate Roy Mustang or Edward Elric, rather than Taylor Herbert. Taylor's cool, but Hunger already destroyed himself to beat the Tyrant. Let's let him reach the happy ending he deserves.