The 4th level Barbarian feat Swipe does not seem to give you anything above two normal Strikes:
You make a wide, arcing swing. Make a single melee Strike and compare the attack roll result to the ACs of up to two foes, each of whom must be within your melee reach and adjacent to the other. Roll damage only once and apply it to each creature you hit. A Swipe counts as two attacks for your multiple attack penalty.
If you’re using a weapon with the sweep trait, its modifier applies to all your Swipe attacks.
For two actions, you get to attack two adjacent creatures, suffering the standard MAP. The only benefit I see that if you have a weapon with the Sweep property, you get to add it to both attacks.
Without a Sweep weapon, is this a wasted feat?