When listening backwards, would it help or hurt to reverse the channels?
If you turn your back on speakers that are normally positioned in front of you, then it would help, because otherwise the left channel speaker would wind up closest to the listener's right ear.
But in this case the left speaker would be on the listener's left side regardless of whether it is positioned in front or at the rear. So therefore the channels should not be switched.
At least, I think so :-)
Best regards,
-- Al