Many electric cars come with a selector that allows the driver to choose a regen level. What I'm suggesting would be the addition of a switch/paddle that would allow the driver to jump from the mode they had chosen to coasting instantaneously. It could be used on hills or when there's a long stretch where you would be slowing down like coming off a highway. Coasting is the most efficient use of the car's momentum and would add additional efficiency to the Aptera's already impressive mileage. The button/paddle would ideally be in a place that the driver can easily reach it without taking their hands off the wheel such as a dedicated button or a paddle on the steering wheel. Once engaged it could be disengaged by pressing the accelerator, the brake or by pressing the button/lever again almost like a reverse cruise control which would then put it back into the original chosen driving mode.
As someone who's driven manual cars and motorcycles my whole life I feel I might miss the lack of transmission. A dedicated coast feature would be like having neutral, allowing the driver to take some control back and adding to the fun of driving it (not that the aptera doesn't sound fun). It would allow people who want to use it to get a bit more mileage out of the battery and for those who don't it wouldn't get in the way.
I don't know if this is possible with in-wheel motors and no transmission but I figured I'd throw the idea out there.