The problem with reverse field reports is the girl is going to say she did everything perfect. If she knows something she is doing is wrong and offputting she wouldn't do it during the booking.
Plus if she wrote things she did wrong it could affect her business so she is going to make her sound like she is some kind of sex queen.
The failures in AWs review system shows exactly what will also happen with the reverse FRs. You give the girl a positive review, you get a positive back saying he was a perfect gent etc.
You give a negative, you get a negative back saying you were dirty and smelly and thats the reason it was poor without fail.