Changes made!
Old Wounds now can no longer be be triggered off of things like bleed or Specialties with a damage cost, so Scar accumulation should be way more normal. Also the cost for Reconstructive Surgery has been split and dropped---it costs much less when just addressing the HP loss. Also Scars reduce Abilities much less often.
The goal with Scars, for groups that choose to use them, is to slow down HP / Ability accumulation over a long campaign. Characters that get hit a lot will still average +1 HP and +.5 Ability per two investigations, and Scars won't affect Specialty gain or finances or any of the other ways investigators have of becoming stronger, so they shouldn't mess with the pulp tone too much.
The current version of the PDF is 12.12.24, and is uploaded.
Thank you for catching this issue!