I propose that the Model S should utilize it's standard brakes and or simply 'waste' regen to ensure the car decelerates at the same rate, regardless of the current level of regen. The reason is, all vehicles, outside of the S, and other EVs, decelerate at the same rate, regardless of fuel level, or outside temperature. (All individual vehicles, obviously a suburban slows at a rate different from a Geo metro). When I get in my Tesla in the morning, sometimes going down a large hill, within 2-3 miles of my home, I don't always know how my car will decelerate. Yes I am fully aware the dash indicates what my regen IS, but not what it will be, before I want to start slowing down. Some mornings I have full regen available, and the car slows at what I'll call the "standard" rate. Other times it slows at a slower rate, and throws me a bit off guard as I'm just waking up and not a morning person... I fully realize it's my responsibility to not crash my car, and I'm not asking for anything else. I would just like, if possible, the car to always decelerate at the same rate, when using regen... it would simplify the driving process.