The directions are floating in space over the map which looks nice but wastes space on the margins. The directions themselves are in a box that also wastes tons of space.

If you reach a destination navigation is cancelled but you cant re-start navigation from there. So if you arrive but Apple Maps wants you to make a left turn across a median it cancels nav and you are in the dark for finding a route around.

I wish usability was a priority but modern UX doesn’t seem to consider it at all.