Zwave 800 Extender to utilize range benefits

Agree. Would also observe that a network “Heal” messes up routings, more than fixes them.
a) Prior to using zwave-js-ui (ZUI) I used zniffer data to build a table for routing.
zwavenodes.pdf (256.7 KB)
b) ZUI has that built in

For an 800 reference. It is at overview level, but there are some nuggets

Good luck in your testing!