I agree with you, it shouldn't be a technical challenge at all and they can do it. My position is that if you choose between switching on the fly and doing it in a menu that it's preferable to switch the audio on the fly. And just because HCEA did it that way, doesn't mean that's the best method if the additional power allows them other options.

Either way it's really not a huge issue, I could live with the other method too.