Original Riptide files
Inventory - Increase to 24 from 12
Increase Stamina regen. Decrease max stamina. Each character still has different max stamina.
Increase sprint speed and sprint stamina consumption. Xian has overrides.
Reduced Kick's stamina usage to 0 - it's the only 0 stamina defensive maneuver. Increase Kick's PhysicsDamage (sends enemies flying farther - also affects John's special kick).  Change Min Hit Severity to Light to trigger broader range of animations. Increase crit probability and force slightly.
Jump stamina cost increase x 2. Xian has override in her _levels.xml
Mix in lighter hit and stand-up animations for some unpredictability

Removed inappropriate word in dev comment
Infected - lowered severity threshold so animations will play even without much damage done. Important because limb and body attacks won't remove many hitpoints.
Make headshots required to kill normal zombies. Limbs are easy to cut off/break, but don't do hitpoint damage.
Increase assist and nearby experience multiplier on normal zombies to help keep cooperative players get similar xp amounts
Normal zombies - lowered severity threshold so animations will play even without much damage done. Important because limb and body attacks won't remove many hitpoints.
normal zombies - have a chance to fall when shot. Increase stamina damage against legs for easier knockdowns. Increase stamina regeneration.

Bullet head hit damage mult doens't seem to work.
Infected - Make headshots almost required. Arms are easy to cut off/break, but don't do hitpoint damage. Back is a good target if you can get there. Legs are not bad. Regenerate when they taunt. Regen stamina faster. Have a chance to fall when shot.
Increase assist and nearby experience multiplier on infected to help keep cooperative players get similar xp amounts
Thugs - more hitpoints but limbs easier to cut/break. They also hit harder.
Bullets do more damage to normal zombies and infected. Important because of less damage done to body. Headshots with guns should kill them now.
Reduce enemy grab chance. QTEs - bleh.
Increase max ammo
Increase crit chance on fists, blunt, cut, ranged, bullets. Increase Blunt force. Added bullet penetration chance (50%). Increase bullet force.
Reduce blunt and cut weapon durability loss