Thorn is my second, I’d imagine you’d want that extra sensitivity to lead a strafing target or line up that fleeing enemy for the kill shot. You’ll find less enemies get away the faster you can turn and shoot.
On that note, my general melee tactic is to circle and strafe so my opponent can’t hit me while I destroy them with combos, with a lower sensitivity this would be less viable as you’d be more strafing than circling and ultimately you’d take a lot more damage and possibly lose the fight. With the assassin types at least - Rath, Phoebe and especially Deande (My main) - you can’t afford to get hit too much in combat. Phoebe perhaps less so an she has True Strike and can buff her defenses which helps her short range low arcing attacks, but if you stand still with Rath or Deande you’re bound to end the fight with low health making your escape treacherous.
Thorn is speedy, really speedy, if you can’t turn fast you can’t chase or flee as effectively as you might like and you’ll feel the weight of those losses that you feel you should have won.