Don
I wouldn't order an old one.. AC are better
Why do you have two subnets (192.168.0.n and 192.168.1.n)?
The packet inspection stuff lives in the USG / USG Pro and that's what provides the historical throughput statistics. The EdgeSwitch isn't part of the UniFi range so you can't add it to your controller, there are rudimentary flow reports available in the UI though.
If your router is setup to work on 192.168.0.n then it would make sense to configure the switch so it's using the same subnet.
How can the switch be 0.1 if the Superhub is also 0.1?
Does the Superhub support DHCP reservations? If it does use them and configure the switch and the AP to use DHCP.
How can I configure it to allow the LAN subnet to reach the network on eth0 (so I can connect to my Vigor 130)?