The highlights:
- A large number of new weapons have been added. This includes new ARs like the M416, new AK variants like the AK103, even a Saiga-12! There are also a bunch of new pistols, including the Five-seven and Glock-18. Existing weapons stats seem to have been tweaked also.
- New attachments have been added for all weapons. There are new grip styles, new optics (including variable ones), flashlight/laser combos and new magazine sizes. Some weapons have more options like different stocks, but these are cosmetic-only for now. All guns also have an "Operator training" attachment which buffs all areas including recoil, reload time and draw speed
- Armor-piecing and hollow-point ammo return from the old game
- New mechanics. You can now carry 2 primary weapons in addition to a pistol with the heaviest carrier option. Laser point-shooting is an option for all guns. General magazine counts are increased by about 1.5x
- All player kits have access to all equipment. The team has one "Team Leader" who serves as the Commander, and everyone else takes the "Operator" kit (who also has the radio)
- New models for vests and carriers which are more authentic and less bulky. These don't support custom camos though
- Default health is now 300 instead of 100 and the headshot damage multiplier is reduced for the Security team. Movement speed is also increased
- The new classes and equipment are only available for the Security team. The health and movement speed buffs are also given to Security only. This means playing Checkpoint Insurgents is very unbalanced, your health and movement are the default values (while the bots are buffed!) and you only have access to the pre-1.9 Insurgent equipment. As a result most servers just remove Insurgent maps from the rotation
- Increased health and movement speed greatly changes up the playstyle. You can tank 2 frags at point blank range with heavy armor, and survive multiple headshots from most guns. Weapon recoil is easier to control. Rushing is far more viable and the game is generally more forgiving. This goes against how EBS usually plays. The mod creators say that they're planning to make health and movement speed configurable, but this is not possible yet.
- The mod is about 4GB to download, easily 3x the size of our biggest maps. Downloading that will take a while for slow connections!
- Naturally there are a few bugs. For example, some weapons turn invisible when paired with certain optics
The server is up as I post this, the IP is 86.10.34.243:27102. I'll try to keep it running as much as possible this weekend.
Any thoughts please leave a reply!
I'm updating the test server to include this. I haven't figured out how to force the game to use "CheckpointHardcore" on the first map after a restart, to get around this an Admin can use the in-game menu to end the round by doing "DEBUG" -> "Server" -> "End Round (Victory)" and you'll go to the map vote, which should all be Hardcore. DON'T use "FORCE GAME OVER" because that breaks it! Unfortunately hardcore mode doesn't work with some of the custom maps we have so I've taken them out for now. 
