[jeffbee]

I would say my greatest suspicion about such a setup would be that your TV is doing a poor job of decoding surround streams into sensible 2-channel downmixes. However, if you're happy with it, that's all that matters.

[hedora]

The AppleTV and Linux do the downmix (and are probably both state of the art at it.)

The console might be suboptimal, but it knows the TV is in 2 channel mode, so it it’s emitting surround encoded signal, that’s just dumb.