There have been a few discussions about depth on atlases. The premace of the atlas originally was to show you roughly where to go, but to make it vague so that you would still need some knowledge of where specifically to go in that area in terms of altitude.
Having zoom could possibly undermine this too. Why did you want zoom anyway? To zoom into the map itself? The map is pretty low resolution, so I don’t think it would help all that much
In terms of ladders, they are planned ( make sure to search for things before suggesting them )