Found the gamesetting controling timescale variable, its
setgs fCalendarTimeScaleGround X
where "X" is your desired value and 15 being the game default value. You gotta retype the command everytime you enter a loading screen or just put this on your StarfieldCustom.ini
[General]
sStartingConsoleCommand=setgs fCalendarTimeScaleGround X;
after doing so, just pass a loadscreen and it should be always keep your desired value. I've been playing the with the command set to 6 and haven't found any issues, mind that i'm playing blind so i don't know if anything is breaking because of that, so as always backup your savefiles and your ini files.
