I think i nice design feature would be that the gas pedal "locks in" your speed until you touch the break pedal.
So, if you are going 35, on a flat surface, it turns on cruise control until you tap the break. However, if you speed up, if automatically sets it to where ever you stop.
The reason i ask for this is because i find it kind of pain to be constantly adjusting my pressure on the gas as i am trying to keep up with traffic, yet not have unnecessary jumps in my speed.
Yes, it would limit regen (you would have to touch your break first, or add a button on the steering wheel) but i think it would make the drive a lot smoother. Or maybe i just need to stop doing up such long bridges.