Biters/spitters, turrets, and spawners don't heal every tick, instead only healing after not taking damage for long enough. Configurable.
Small changes concerning balance, gameplay, or graphics.
New ways to deal with enemies, be it attack or defense.
Changes to enemies or entirely new enemies to deal with.
Thanks for bringing up this mod! I like the idea of delayed enemy health generation. Always annoys me when the enemies are suddenly regenerating after my first attack. That enables to more tactical attacks now :-)