Yea, that's me, and yes, I've updated device OTA firmware while the device remains on the existing.
I have a "spare" Aeon Z-Stick and I've joined it to the Network established by Hubitat. It's rather a lot like having to Include a Minimote. You end up with another controller on the ZWave network. I do that on a Virtual Machine because that's easiest for me. I'm an ALL MAC house and the only way I'm letting a Windows machine in here is virtually 
I follow the Aeon instructions but start with something like Step 3 (after the device is found on the network).
I've successfully updated several Aeon MultiSensor6's and an Aeon Minimote. I tried to update an Aeon LED Bulb (RGBWW) and although it "started" - after 3 hours no progress showed. By that time it was getting dark and I needed the LED Bulb back in it's room. I have not yet retried, but given the reluctance I've already experienced with this OTA process, I'm hopeful the 2nd or 3rd or 4th attempt works. I moved the LED bulb closer to the Z-Stick, just 1) because it's a bulb, easy to move! and 2) just in case distance matters. I have no reason to think it's due to being on the same network. It is after all a parallel buildout. The ZStick is dedicated to the Update, and the Bulb (or other devices) have not been 'busy' with their 'real' tasks. Once the upgrade progress bar started going, it has been just a minute or two to complete.
