Machinist needs help.

[CKNovel]

High level traits are intended to adjust actions to make use of them in higher level content, but not lower level content.

Across the board fixes are generally about playability, not necessarily power. For example, Aspect Mastery is largely a playability buff, though you'll probably see a general numbers improvement at lower skill levels just because of the way it works.

This is the same thinking as the Tank "Melee Mastery" traits, which are there to increase a tank's relative potency moving forward from that point, without increasing their power before that point.

Melee mastery makes sense, we've seen how UCOB and UWU "suffered" and their DPS check just got snapped.
But this is why I've been comparing it to Addle and more specifically Feint.

Feint has been niche for a long time, no raidwide was on magic damage except... A10S? That's the only one that comes to mind.
Now it's effective against every raidwide, every source of damage. Not on equal ground, weaker against magical but still effective.
And since it's not a trait, it's a mitigation that now works in every content regardless of the level against magic damage.

But Tactician&Co needs a trait? If it was to add a charge, okay. But reduce its cooldown by a mere 30s does it needs a trait?
Meanwhile Feint is now effective in every content? In ultimate, one more magical mitigation helps a lot.

[Kabooa]

Feint has been niche for a long time, no raidwide was on magic damage except... A10S? That's the only one that comes to mind.
Now it's effective against every raidwide, every source of damage. Not on equal ground, weaker against magical but still effective.
And since it's not a trait, it's a mitigation that now works in every content regardless of the level against magic damage.

But Tactician&Co needs a trait? If it was to add a charge, okay. But reduce its cooldown by a mere 30s does it needs a trait?
Meanwhile Feint is now effective in every content? In ultimate, one more magical mitigation helps a lot.

Feint and addle cannot apply to damage sources that cannot be targeted, cannot be applied to multiple targets with one use, and are not equivalently powerful.

This is likely more a case of a targeted buff towards Melee than it is towards Casters, where as the trait making the 120s defensive from Ranged into 90s is significantly more powerful.

[CKNovel]

Feint and addle cannot apply to damage sources that cannot be targeted, cannot be applied to multiple targets with one use, and are not equivalently powerful.

This is likely more a case of a targeted buff towards Melee than it is towards Casters, where as the trait making the 120s defensive from Ranged into 90s is significantly more powerful.

I've heard this argument again and again but please provide example where this applies.
I've been thinking through this argument and this expansion including Stormblood Ultimate and so far:
-Heavensfall on UCOB works but since it's multiple weak damage there is better places, most of the time it's megaflare you want to mitigate.
-First UWU P4 mechanic you can use mitigation and shield to survive one set of Ifrit dashes due to extra HP. But that's the case of doing the mechanic "wrong".

As for TEA, you want to mitig when the bosses are targetable and most of the time only one boss deals raidwide damage (See Pepsiman for P1 and Brute that deals most of the mechanics for P2.)

Nothing to report on the first raid tier.
Second raid tier... There is a place in E6S you can use that advantage but the last phase is right behind with big damage to mitigate.
E7S has an add phase but again it's better to use it on other places.
E8S... Maybe the add phase but you can't get all 8 players.

3rd raid tier, nothing. Bosses are always targetable when they deal massive damage.
Especially in E12S where your team will spread to deal with Lions and in P2 you want to mitigate the cast right before the boss goes untargetable.