The Tesla Nav is by far the best Nav that I've ever seen in a vehicle. I have used a Garmin GPS in every car that I've used for the last 20 years and I've got one for the rental cars that I use on a regular basis. While the Tesla is not quite as nice as the Garmin, it's usable.
I'm guess that the real reason why you are asking the question is because you had rather have other screens showing and are trying to provide to Tesla that the software change is a bad one. As a Model 3 owner, I don't feel that the UI is a bad one, it is actually quite functional. From what I understand, the biggest item is the rear view camera. And yes, it doesn't have a permanent location on the screen, it is easy to popup over the map when you need it, and yes you do have to keep doing it.
But at this point, I'd be hesitant getting really used to using the display for rear or surround view navigation, it keeps you from being proficient when you move to other cars.