I think brake & throttle help penalty is not about fast or slow , its about tire conservation which is critical at endurance race. ( and that's a one of reasons many RL races banned ABS/TCS )
and those parts should have "some" weights of course ( yes! they are some metal parts..)
everyone knows auto(and semi auto) transmission heavier than manual , non-ABS/TCS car slightly lighter than equipped car
As we all konw , LFS doesn't have any penalty for driving assistance...
assist option and transmission type should go under each car's setup menu
example
1. auto & sequential mission = + 10 kg
2. brake help = + 5 kg
3. throttle help = + 5 kg
4. auto clutch = + 5 kg : if u dont use this assist, u can stall your engine and u will get new "engine start" button for that. ( 3-5 sec delay for restart)
5. auto lift = + 5 kg
6. auto blip = + 5 kg
10 - 25 kg penalty is not a big deal for your lap time.
but it makes tiny difference between who does and doesn't
with this feature we dont have to force assist option for league players.
and i think we also need "pure weight peanlty system" for league which can set by host admin to each player (according to last race results, 20-50 kg winner's penalty)