I am still testing but so far everything looks good after performing the migration from C7 to C8PRO... Followed the official directions to the T and everything went normally. Cloud restore looks like it did its job fine.
.Initially had some issues with my IP related integrations post migration like grafana, influxdb logger etc... and then I realized I had some mac address filtering on the iot zone firewalls (matching the C7 MAC, So C8 was getting refused).. Once I fixed that in my router, they all came back.
My Zwave mesh map went from looking like a tangled and stoned out spider's web nest of connections and routes to a straight spoke and wheel... every device is a direct route from the hub.