No need for a syncing solution as the setup is a one-time event... Right?
Well, if you make changes on one device, the change should be reflected on all other devices. Settings, libraries, access control etc. So, we need some kind of sync.
But the root problem is really this:
KODI needs to offload the control plane on to a central server service. That service is in control of remoting devices. The service can synchronize two or more devices. The KODI on screen buttons really sends commands to the service, which in turn sends the action to the device.
Then we can have true central control of how many devices we want, with multitenancy.
KODI should be the video alternative as the Logitech Media Server is for music.
The configuration is your personal settings and independent of the type of device.
Of course, the KODI Server can exist in the same device as the KODI Client, just as piCorePlayer merges LMS and a software player onto the same device.
I think the Chrorus 2 web interface is just awful and useless. It should be central to the KODI solution.