It would be very useful for Channels to pickup and use the favorites and channel exclusions as set on the HDHomerun device’s channel line-up. This will avoid having to do this setup repeatedly on multiple player devices and on the DVR.
The DVR does, and the Android/Amazon apps do. The iOS/tvOS apps read it at first start up, but after that it's only on the client.
Better synchronization is on the roadmap, though.