It's about time Shield oath and Grit become Abilities instead of Spells. (off-GCD)

[Chrono_Rising]

...

I'm not sure how you got to this conclusion. Does that mean you're going to stop using Sheltron/TBN? If content required more frequent on-demand mitigation, War is more than capable of providing it. But since it's locked behind tank stance it would likely just move to back to the OT role to optimize it's damage instead. And, since you're using Sheltron/TBN despite content not requiring it, do you not think War would use IB more if were unlocked from Defiance?

I hate to say this, but they probably should have unlocked IB from Defiance instead of giving War Rampart.

I reached this conclusion by mapping out the cooldowns of both myself and my co-tank since a5s. Limiting ourselves to just stormblood savage content, inner beast use isn't required of a warrior. The reason why? Warrior's short cooldowns are more than enough to handle mechanics without needing to use inner beast. It does take timing, but when you do have tank busters which are close together you can often fit them in to a single cooldown, in god kefka there is a series of 3 tank busters which can be fit into a single vengeance use, that doesn't happen on paladin or dark knight.

You asked if that means I would stop using TBN and Sheltron. The answer is no, because sometimes the only mitigation I have on those jobs is sheltron or tbn, and thats because because you do not have short cooldowns with large durations like warrior. Have I ever needed mitigation on a 15 second basis frequently throughout a fight? Also no, thats how I come to the conclusion that:
(1) warrior's cooldown kit is designed around not having IB to the point that IB is unnecessary
(2) The game does not require tanks to need access to mitigation every 15 to 24 seconds.

Together this is how I reach my final conclusions:

(3) Warrior's higher offensive capabilities are not justified by its defensive kit
(4) Warrior's defensive kit does not justify the flexibility it receives when it comes to its tank stance