We drive the smartest cars on the planet. Let's help out our fellow owners who forget to turn off their turn signal and never change lanes. This could be added to the senior citizen option ideas. Increasing size of flashing arrow with increasing volume over time.
An optional button to enable dynamic "de-fishing" to present a display similar to a normal rear view mirror in terms of field of view. It's pretty simple to do and it would solve the issue of the image cutting off too much of the bottom of the view.
When it's raining heavy the fastest speed on the wiper settings is not fast enough. If one more speed was added this would definitely make it safer while driving in the rain.