1) Yes, it makes sense 2) Yes, I think you are on the right track 3) On both remote remotes, you could create a Generic Activity (under Utility type) will all the devices except for the TV and AVR devices. Selecting this activity would turn off only the TV and AVR device. You could map this activity to one of the Hard activity key - like the one below the "Off" key. You would use the "Off" key to turn everything off on both remotes.
