Not sure if this is a feature that’s supposed to be in the game (making its absence a bug) or just something that was never implemented (making this a feature request) but the falloff parameters on the newLight_spot and newLight_point entities do not work- their falloff is always quadratic.
Yes old fall-off parameters are no longer supported. They have been taken out of shaders to reduce complexity.
Lights dont have any explicit falloff parameter in current version and they always follow quadratic fall off curve only, its more physically based and gives better results in our experience.