Reworks the entire health system.
The new system is based on Rimworld:
Your aliveness is determined by your "consciousness". Your consciousness goes up or down based on a number of factors, such as damage sustained to your body, wounds, diseases, pain, hunger, and so on...
This makes crit far less binary. You don't fall into crit the moment you hit 100 damage, so fights in general will be a bit more drawn out, resulting in proper brawls rather than slug matches.
Bodyparts in general can now sustain a lot more damage independently. So can your brain.
Stamcrit is removed, but stamina is not.
Most stamina sources still exist, but they largely just function as a way to slow down your character's movement, modelling fatigue. IE, in sprinting.
Larger sources of stamina damage like batons now inflict pain. This pain is very high but quickly goes away after a short time (like stamina).
This does mean if you repeatedly, carelessly, hit someone with a baton, they might fall into shock. Don't worry it won't happen from just arresting someone.
Speaking of batons, they now take more than two hits to down someone. 3-4 now. Also painkillers make you resistant to batons.
A lot of broader changes have been made to wounds and related health systems:
Projectiles are now much more likely to embed, won't fall out on their own, and can't be seen at a glance while embedded.
It's more difficult to diagnose what wounds you are suffering without medical help (a health scanner).
You can now suffer a fractured rib, as a low tier chest wound.
You can now suffer from internal bleeding, which requires surgery to fix.
Health analyzer printouts are a lot easier to parse and provide more information for treatment.
Failing to take multiple breaths in sequence will incur brain damage over time.
Attempting to breath in a vacuum is a lot more punishing on your lungs.
Determination (adrenaline) is no longer a reagent.
Maybe some other things, look at the LOC there's probably something I forgot
Reworks the entire health system. The new system is based on Rimworld: