I like the focus on safety on that SafetyPilot package; here are some more ideas:
Auto mute radio: outside sirens or flashing lights (which operate at certain rates that is how they trigger intersections to turn green.)
Smart traction controlled braking; beyond ABS.
Brake control with steering assist to prevent roll overs etc. especially on ice:
Would be nice if it could help me steer away from the ditch instead of slamming on the brakes and killing any hope of steering! You have a huge disadvantage with only 1 back wheel so this should be an area of focus. We put the best wheels in the back for a reason (go ask if you don't know-- insurance corps push this because fishtailing creates more injuries.)
Smarter Cruise Control -- adjust speed for hills and later have it change with the speed limit too.
Weight estimate: use acceleration and power load to estimate the weight of the car. More useful later with a small trailer. This could help better estimate distance; or overloading the trailer.
Driver Ratings: energy use, safety, tire wear, break wear, cornering etc. Maybe this could fingerprint drivers?
Smart High Beam lights: newer feature of some cars already
Remind user of routine maintenance. I would think a brake pad estimate is possible based upon use rather than the odometer. Battery issues too. Wiper fluid level? (you know they pushed the button...telling the user to check level based upon usage.) Wipers and Tires as well. Not everybody pays attention.
On April Fools: tell user they are low on gas.
My friend watches TV shows with his Tesla because it drives too well but he over used lane assist in the previous car too. It's not safe if it works too well. Best to aim for full acceleration/braking while making the driver have to steer to pay proper attention.