Enforcer - Strength based Rouge subclass

This is my idea for a strength based rouge. If you've ever wanted to play a bulky henchman, goon, or other nasty thug, this is the subclass for you.

Any feedback or suggestions for the 17th level feature would be appreciated, I haven't played much high-level D&D.

Enforcers are the brutes, thugs, and bodyguards among criminal circles. If the Boss needs to collect a debt, intimidate someone, or simply send a message, they send you.

Level 3: Enforcer Training

     You gain proficiency with martial melee weapons, medium armor, and shields. 

     You can ignore the finesse requirement when making a Sneak Attack with a melee weapon. In addition, you can Sneak Attack with Unarmed Strikes if you use the damage feature.

     When you gain your Cunning Strike feature, you can use Strength instead of Dexterity when determining the DC.

Level 3: Brawler

     When you hit with your Unarmed Strike and deal damage, you can deal Bludgeoning damage equal to 1d6 plus your Strength or Dexterity modifier (your choice) instead of the normal damage of an Unarmed Strike.

     In addition, you can make an Unarmed Strike as a Bonus Action. You can make this Bonus Action an amount of times equal to your Strength or Dexterity modifier (whichever is higher) and you regain all uses when you finish a short rest.

Level 9: Cunning Brutality

You gain the following Cunning Strike options.

Grappling Strike (Cost: 1d6). The target must succeed on a Dexterity saving throw or be grappled by you.

You must have a free hand, and the target must be large or smaller, to use this feature.

Imposing Strike (Cost: 1d6). The target must succeed on a Wisdom saving throw, or it has the Frightened condition for 1 minute. 

The Frightened target repeats the save at the end of each of its turns, ending the effect on itself on a success.

Level 13: Uncanny Retribution

Your training allows you to shrug off blows and strike back in revenge.

When you use your Uncanny Dodge, you can make a single melee weapon attack or unarmed strike as part of the same reaction.
You can use this feature a number of times equal to your Strength or Dexterity modifier (whichever is higher), and you regain all uses when you finish a long rest.

Level 17: WIP

WIP

For Enforcer Training, I would recommend explicitly stating whether Sneak Attack is available on all Unarmed Strikes or just on damaging ones. I'm not really sure which way I'd go on it, but if it's not spelled out one way or the other, it's something people would get into stupid forum arguments about.

For Brawler, I'd make it 1d6 damage instead of 1d4. This makes it a bit better than Tavern Brawler and the same as the various species options that provide Unarmed Strike damage overrides, which seems right for something you're probably going to use a lot.

For Uncanny Retribution, I would suggest two things:

1. Limit the attack granted by using Uncanny Dodge to be a melee weapon attack or an unarmed strike. Shooting back with a longbow or something seems off-brand for this.
2. Make the number of times you can use this equal to your Strength modifier rather than your Proficiency Bonus (in keeping with the general design philosophy for 5.5e class features).

Thank you for your suggestions, being able to use ranged weapons with Uncanny Retribution was an oversight. And the other changes will make thinks slightly smoother.