Dirty Fighter

You have mastered the techniques of dirty fighting. You know how to fake out your opponent and where to strike to cause the most damage in a hurry. When making a standard melee attack, you may choose to perform a feint, pretending to make a certain strike, then twisting the attack at the last minute and striking a vital area. For this attack, you may apply your Sneak Attack damage even if you do not have advantage on the strike. You must take a short rest before using this ability again.

My thought is to use this as a sort of baseline ability to be built off of at higher levels, sort of like the Channel Divinity ability. Perhaps at higher levels the strike can become a called strike that causes lingering effects on top of the Sneak Attack (or instead of it) damage. A strike to eyes may cause blindness for a round; a strike to the leg may hamper movement, things like that. And/or they may get more uses of the Dirty Fighter strike. - Friartook