I wasn't really interested in the "up is the direction of travel" for the 17" that many really want. I knew that Tesla would keep a setting for the existing north up, so I wasn't worried about it. I can confirm that my expectation was correct -- you can easily toggle between the two choices.
Hopefully the below isn't a spoiler. I'll obfuscate it somewhat in case people want to see the map experience in 5.6 for themselves rather than reading about it.
What I wasn't expecting or ready for is how they would implement the two settings.
So let's start with how it was in 4.5 (to my recollection). There's a "target" / "crosshairs" icon that can be used to snap to map such that the vehicle indicator (the triangle) is in the center. If you pan the map, the icon goes to its inactive color (gray?). If you want to re-center again, you tap the icon and you're back and it lights up (blue).
In 5.6, it's a variation on the theme but it didn't "get" it at first. The icon is gone and there's a new one that, to me at least, obviously indicated that I was in "north up" mode. I then tapped it a few times seeing how it would work and indeed could see that it would toggle between the two flavors of directional preference. But then my next thought was .. but what about the re-centering button? So I played with it some more and it became obvious. The old model was "pan disables auto-center", and the new model is too. Tapping the new button snaps and establishes the directional preference and lights it up. Tapping it again keeps the centering but toggles the directional preference. Simple, clean, intuitive.
The interesting part, that I wasn't aware they had included, is the enhancement from "pinch to zoom" to "pinch to zoom, and rotate" gesture. It's very much what I expect from previous implementations (in various browsers and apps) and I like it. Much.
For those of you that don't have a white background, hopefully the shrunk text size will obfuscate it enough that you can bypass reading it if you want. For those that do have a white background, select the area before the smilie to see the text.