Features

Civilian Factions: these determine the spawning of civilians, their vehicles, player load outs, and arsenal starting gear
Settings: various settings exposed in Configure > Addon Options (CBA settings), including AI skill, general difficulty, performance
Autosave: automatically save based on a few conditions (configure in Addon Options)
Autoload: automatically load the last save when the mission starts (configure in Addon Options)
Server suspend: on dedicated server the game will fully suspend when no players are on (toggle in Addon Options)
Skip time: a limited set of options to skip time (access in U menu)
Idle behavior: units will relax on chairs, in buildings, or at the shooting range when not otherwise busy

Tweaks

Improvements in AI attack and defend behavior
Civilian militants (in towns) will upgrade their gear automatically, and form groups, depending on the level of instability.
Civilian militants will sometimes inform player of local intel (not just locations), e.g. patrols and convoys that are scheduled to travel through the town.
Enemy vehicles are locked by default and must be unlocked with an action prior to entering
More varied player spawning loadouts, determined by civ factions -- occasionally includes primary weapons
Supply convoys will now have scheduled intermediate stops in towns on the way to their destination (check the intel for the schedule)
Changed amount of medical items in cargo boxes, NVGs, explosives and grenades are now also added to cargo boxes (if they are present in loadouts of faction)
Loading screen tweaks
Player respawn at camps no longer requires infantry capacity

3CB BAF (@Jasperdoit)
APD Police (@MatrikSky)
CUP AFRF, CUP RUS Police, and CUP USMC (@panda)
CUP Civilians (@panda)
Gendarmarie Exp Police (Police units from the Gendarmarie Expansion addon) (@panda)
German Military and GSG9 factions (@Jasperdoit)
Global Mobilization (@panda)
RHS BW and Niarms (@Lazejun)
RHS-BW Trop (German Armed forces with American Vehicles), and RHS-BW-Niarms Trop (@Lazejun)
Updates for night combat (@Sebastian)
Vanilla LDF faction (@MatrikSky)
WW2 Civilians (@MatrikSky)
WW2 factions reworked to have fully custom loadouts (@MatrikSky)
WW2 Red Army and WW2 NKWD Police (@MatrikSky)

Build rate can now be completely zeroed stopping constructions from degrading
Fixed error which made bots discover locations without seeing them, based on memory of vehicles spotted earlier
Fixed wrong infantry capacity numbers of large tents
Garrison and location objects are now processed unscheduled, should help with too long response time of various player actions (recruiting, claiming a location, building a camp, etc)
Large cargo crates are removed from police stations
meta.cpp file added, should resolve issues with connecting to server through launcher
Officers no longer assigned to locations other than outposts/bases/airfields
Various arsenal fixes from @jeroen Not