Those guidelines are actually reasonable.
less than 0.7 m/s² The signal shall not be generated
> 0.7 m/s² and less than 1.3 m/s² The signal may be generated
> 1.3 m/s² The signal shall be generated
Leaf limits regen to 30kW rate without brake pedal. With pedal it is limited to 50kW. But that also turns on brake lights.
I'll try to measure G-forces with phone while decelerating at 30kW and vehicle absolutely empty (only driver).
Not sure my phone will have good reading. So limits are around 0.07G and 0,13G.