I know the BMW shifters you're talking about, but there is one significant difference: the mechanism for entering Park is not like the rest of the gear selection options (Drive, Neutral, Reverse). It's a button on the top of the shifter. As such, when you want to put the car in park, you push a button, you don't move the shifter.
I'm not saying this is a great shifter design overall, but it DOES mean that you quickly learn a completely different routine for putting the car in park. Basically: "If I want the car to be moving, then move the shifter. If I want the car to stop moving, push the button."
There is a separate Park button, and I think there is no risk of confusion. I have actually occasionally powered down the car when I just wanted to put it in park, but there is no real danger in that.
It automatically engages "Park" when powering down, but not when exiting the car, but maybe it should as long as the car is not moving when the door is opened.
Actually, as the car is aware of that no one is sitting in the drivers seat, it would be trivial for Mitsubishi to program it to prevent the car from moving, or at least starting to move from a stand still using the ordinary brakes.
I guess that would be true for all cars with airbags, which would be every car sold, at least in in USA and EU.
Actually, even now the car can not be towed if it is out of power.
To tow, you need at least a booster battery to boot the 12v systems in the car. Or you need to lift it. Not a problem for an road assistance service, but potentially irritating if you are on your own.
The traction battery does not have to be online though.
I'm not saying this is a great shifter design overall, but it DOES mean that you quickly learn a completely different routine for putting the car in park. Basically: "If I want the car to be moving, then move the shifter. If I want the car to stop moving, push the button."