Yeah, I couldn't tell much of a difference at all between Bypass L/R vs. Flat. I could keep it on Flat and wouldn't even notice a difference. But because I couldn't tell the difference anyway, I figured why even keep Audyssey for the fronts?
I bet the next step would be for manufacturers to implement "Audyssey Bypass" in which all channels (L/R/C/SL/SR) are bypassed except the Subwoofers. So we would have 5 options - Audyssey Reference, Audyssey Flat, Audyssey Bypass L/R, Audyssey Bypass, OFF.
That might FORCE me to buy a new processor.