Atonement is integral to the Disc experience- Blizzard doesn’t want us abandoning Atonement completely. That’s why it’s the first talent point. There is a nuance in how much it contributes, and how it contributes. Disc’s other tools, damage reduction, shields, instants, etc, are also a spectrum.
I see it the two hero specs as leaning towards one nuance and away from the other, without abandoning either completely.
With Voidweaver, I don’t think of it as merely Atonement. I think of it as the “ramp” style Atonement- why I called it Atonement/Scism/SCov trinity. You spend a lot of GCD’s to set up a large burst of Atonement healing. Voidweaver leans into this playstyle. It still uses mitigation, shields, etc, but not as much. I don’t like it- but it’s popular, and I wouldn’t to take it away or nerf it.
Oracle leans towards mitigation tools, but also, a more consistent, lower burst, less setup-based Atonement. I argue it’s not that Oracle is far less reliant on Atonement for its output, it’s less reliant on Atonement maintenance for its gameplay loop. That’s the appeal to me; trading burst for flexibility.
As to why individual parts seem scattershot? I chalk that up to Blizzard being reactionary, without an over-arcing goal:
The 4 second Atonement duration means less time is used to maintain Atonement. Without it, Oracle has to spend more time juggling Atonements- even if it gets less out of Atonement, it still can’t heal properly without it. This helps ease pressure.
A lot of Disc encourages offensive Penance- Twinsight mitigates the penalty of using a defensive Penance.
The damage modifiers on Oracle spells were a reaction to the (still large) damage disparity with Voidweaver.
Oracle only has good Feathers, VW has base feathers and dark energy, that stack.
Nerfs to raid Atonement- because Blizzard is bad at balancing, lol? Actually, I think it’s because the devs are shorthanded and overworked, and don’t have time to address minute subtleties in balancing, so they look at specs or even classes as a whole and take nerf bats to the simplest targets to correct perceived issues.
I agree they need more targeted nerfs, but disagree with the one’s you’re proposing.
The thing I take the most issue with is the 15% nerf to Penance healing. It’s Disc’s only good spot heal, and even using it as a heal hurts our overall hps, so it’s relegated to emergency usage. It’s not broken, it doesn’t contribute to any of the issue other whine about. This nerf was unnecessary.