Love the game, I am only picking nits because I care.
The Infernals' Unknowable move adds "they lose 1 String on you" as a 7-9 option on Lash out physically. As I read it, it is an additional option on the list, meaning you don't need to pick one of the three defaults. In the vast majority of situations, I don't see this as a difficult choice or hard bargain.
Is that intentional, to encourage a bit of the old ultraviolence from the skin? Because as I read it, it means 7-9 has a Yes, and result rather than Yes, but. If I was playing a Werewolf or Chosen with a liking for approaching problem resolution through the application of force, this would be a very tempting other skin move, removing as it does the mechanical downside of a 7-9. The fictional effects of using violence to solve your problems remain very much intact, obviously, and is that where you see the consequences being?