This is something I asked about months ago as well, I also have the 8000NEX. I just installed the latest 1.08 update and it seems like the fix for this didn't make it. The map viewpoint still only has 3 levels, close, normal & far and attempting to zoom only wants to add a destination. Going back to the map display resets it to the viewpoint level.
This really bites, I was hoping for a fix, it seems so simple.