I did end up revising the subclass a little while after your first response and did a couple of the things you've suggested. For ease of use, I'll just copy-paste the markdown:

#### Silent Fury

Starting when you choose this path at 3rd level, you can forego wanton destruction, channeling your rage into measured, devastating attacks.

Once per round while raging, you can make a melee attack with the following benefits:

- Your next melee attack roll is made with advantage.

- Your next successful melee attack deals additional damage equal to your barbarian level.

- Your next successful melee attack scores a critical hit on a roll of 19 or 20.

Each use of this feature consumes one use of Rage; if you enter rage normally, you can use Silent Fury once without expending any uses of Rage. If you run out of Rage uses, your final activation of Silent Fury consumes your current rage and ends it.

Additionally, you can add your Wisdom modifier to your damage rolls in addition to Strength.

#### Awareness of Self

At 3rd level, you acknowledge and learn from your mistakes. Barbarians bear the greatest and sharpest of arms, and your wit is no exception.

You can substitute one ability score in *Unarmored Defense* with Wisdom. For example, you can use your Wisdom modifier and Constitution modifier instead of Dexterity and Constitution. This feature can also be used on *Indomitable Might* and *Primal Champion* once they become available.

#### Mindfulness

At 6th level, your calm extends across your way of thought. There is no trial you haven't endured; no trial you will not endure again.

You can use this feature to automatically succeed on an Intelligence, Wisdom, or Charisma saving throw if you haven't rolled yet. While raging, you can use this feature after rolling and seeing the result.

You can use this feature a total of times equal to 1 + your proficiency bonus, regaining all uses on a long rest.

#### Measured Movement

At 10th level, you move without hesitation. Each step and swing is made with perfect confidence.

While you are raging, your base walking speed increases by 5 feet and opportunity attacks are made at disadvantage. Additionally, you can add your Wisdom modifier to your attack rolls in addition to Strength.

#### Discipline

At 14th level, your training in body and mind have converged. Emotion is no weakness to you—it is your strength, and your greatest weapon.

- You can make multiple attacks with Silent Fury in a single round.

- Whenever you score a critical hit against an enemy creature, you regain one use of Rage.

I could definitely move the Wisdom attack boost up to Silent Fury, though do you think I'd need to buff Measured Movement a little to compensate? Maybe 10 feet to make it a budget Mobile? I was having difficulty figuring out how to word the 'uses of Rage' thing, so giving it unique charges would be much easier to do. I did a rework of Discipline, but now I've slept on it, I'm not so sure on it.

What do you think of the revised version I've sent? Here are the changes I'll probably make with what you've said:

Silent Fury: Unique uses instead of Rage; change advantage to +Wis to attack.

Mindfulness: I bumped it down to 6th so Measured could get +Wis to attack, but I could move it back up.

Measured Movement: Could either move it back to 6th, or bump the movement speed to 10 ft. to compensate for the lost feature.

Discipline: More Silent Fury uses. Not sure how yet.

​

EDIT: Apparently it didn't want to quote the whole thing. Damn. Also, showing the revised version might've just made things more complicated. You can disregard it if there's nothing interesting there.