There have been changes to recoil and spread of weapons to make them more like the original. That could be good and could be bad. I don’t know what will happen but I guess we’ll find out? Server make kick me when I try it out. 
FROM THEIR GIT PAGE:
Bug Fixes
More accurate weapon firing rate control (27d9320)
Recoil amounts are updated to match the original client, thanks to experiments conducted by kmsiapps (#551)
#254 block restocking doesn’t work properly in /god mod
Security and compatibility fixes
New Features
SSAO and visual adjustments (takes in effect only with HDR) (#515, 6279c9e)
Alt-Enter to toggle fullscreen mode (05156b5)
Enhanced environmental audio (7a14c39)
More perceivable tracer bullets (6d6e55b)
Tracers are now displayed on the minimap (8349b4c)
Network protocol extensions (#561), which would make awesome things including server message localization possible in a near future (with updated servers)!
Updates can now be checked automatically! (#526)
To package maintainers and redistributors: This feature is configured by Resources/PackageInfo.json. Please contact us by posting here for details.
Locale Support
French translation by damienflament (#525, #567)
Dutch translation by Tapmemer (#523)
Spanish translation by brunodiazu(#543)
New translation platform is here! Anyone can create an account and submit translations for their language! (If your language is not on the list, please contact me and I’ll add it to the list)
