I don't see how it would be related to an IP change. You should not have to exclude everything and start over again. A zwave repair is likely not going to help. In fact a full repair is not recommended on the C7.
I personally don't find the zwave topology to be all that helpful but it could be I'm just not that great at reading it. Off the top of my head though I'd say your zwave mesh may not be all that healthy. A number of your devices don't appear to have many neighbors. It may also be that you've got a device acting as a repeater that has become unstable.
Do you think you could post a snapshot of your zwave details page? Also try @tony.fleisher's super helpful zwave details app... [BETA] A Z-Wave Mesh Tool [C7 and 2.2.4+ Only]. It gives you basically the same info as the details page but with a much more extensive UI.
In the mean time... any devices with S0 security? Any Zooz 4-1 sensors? Any power-reporting sensors or any sensors that are particularly chatty?
I would also shut the hub down cleanly, remove power (at the outlet side, please... not the hub side), wait a minute or so, and plug it back in. This gives the zwave radio a chance to reset. You can also try a much longer shutdown, say 20 min, which will cause your mesh to start more-or-less frantically rebuilding.
