The main motivation is a melee oriented subclass that can sneak attack with non-finesse weapons. I did not include any extra weapon proficiencies, so to really max this with polearms one would need to subclass or take the weapon master feat. Also a character would need both a high strength (for weapon hit/damage) and high dexterity to subclass so you could not dump one of dex or strength as melee-oriented characters normally do.
Anyway here is what I have, let me know what you think:
Fearsome Reputation
At 3rd level you get proficiency in intimidation and your proficiency bonus is doubled.
Versatile attacker
At 3rd level your sneak attack ability can be used with any simple or martial weapon with which you are proficient.
Threatening Demeanor
At 9th level, your fearsome reputation becomes extraordinarily threatening. As an action, you can make a Charisma (Intimidation) check contested by a creature's Wisdom save. The creature must be able to hear you, and the two of you must share a language.
If the creature fails its save it is frightened for one minute. A hostile creature can repeat this save at the end of every turn. If it saves this can not affect the same creature again for 24 hours.
Fighting style
At 13th level you can select a fighting style from Defense, Dueling, Great Weapon fighting or two weapon fighting
Multiple melee attack
At 17th level you can make a second attack when you take the attack action. The second attack must be a melee attack and it can benefit from your Sneak Attack even if you have already used it during this turn, but you can't use your Sneak Attack against the same target more than once in a turn.
Anyway here is what I have, let me know what you think:
Fearsome Reputation
At 3rd level you get proficiency in intimidation and your proficiency bonus is doubled.
Versatile attacker
At 3rd level your sneak attack ability can be used with any simple or martial weapon with which you are proficient.
Threatening Demeanor
At 9th level, your fearsome reputation becomes extraordinarily threatening. As an action, you can make a Charisma (Intimidation) check contested by a creature's Wisdom save. The creature must be able to hear you, and the two of you must share a language.
If the creature fails its save it is frightened for one minute. A hostile creature can repeat this save at the end of every turn. If it saves this can not affect the same creature again for 24 hours.
Fighting style
At 13th level you can select a fighting style from Defense, Dueling, Great Weapon fighting or two weapon fighting
Multiple melee attack
At 17th level you can make a second attack when you take the attack action. The second attack must be a melee attack and it can benefit from your Sneak Attack even if you have already used it during this turn, but you can't use your Sneak Attack against the same target more than once in a turn.