You can use nearly any Ember device - I have software available, and instructions, to make it a sniffer.
It’s possible, but to be honest, I doubt it unless you can correlate wifi activity with this not working. The RSSI levels I’ve seen in you log are generally quite healthy.
Changing channel is not really supported in the binding since it can cause devices to get lost. Currently, it should be possible to change channel, but then yes, you would have to reinitialise your system and reinclude the devices.
My feeling is that is not the problem.
Can you provide a log during the binding startup please - I want to check the coordinator configuration.
I’ll also see if I can get the new routing information commands added shortly.