A long, long, time ago, battery events vanished from the device events history overnight without comment. Reading the developer documentation much later gave the impression that the battery was considered part of the ‘health’ of a device, as were things like the signal strength. So I’ve always hoped we were going to see significant developments with the device health endpoint. Not a sniff so far though.
There are a few ZigBee and Z-Wave bits and bobs in the devices endpoint but no sign of any routing information yet. It was possible to read it in Groovy Device Handlers, though I’ve long since forgotten how, so I can’t imagine it isn’t lurking somewhere. I’d like to think it isn’t available because something better is coming along, but then I like to think when the legacy platform sunsets a whole lot of toys will see the light of day.