I agree, I think a visual map is going to be not very useful. Z-wave has no concept of distance and precise location. If one device is trying to find a route to the hub and a device clear across the house is responding the best it will assume it must be near by and in the path to the hub, and route through it. If you dig too deep it is just frustrating. Just have to learn to let it do its thing as long as the devices all keep working. Trust me I have tried and tried to get things to route logically and it just does whatever it wants in the end, but the devices work.
The Z-Wave tool mentioned above is great for if you suspect issues, you can dig in and get as much info as possible to help figure it out. [BETA] A Z-Wave Mesh Tool [C7 and 2.2.4+ Only]
