About being protected - there will need to be award space available on other airlines (excluding AC) availble. On AC metal, they will pull revenue seats for you. So as much as the first agent tried to be helpful, she was incorrect that you can pick any route you want with 'F' class.
<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by Travellin_man:
If I was booked YYZ-SAN in Y and upgraded to C at time of booking, with ticket issued in business, would I be protected in coach or business?</font>
If your fare basis was either CMA3UP or CY1UP, then you would be protected in business class. If you were simply on full Y and upgraded to J as SE, then you will only be protected in Y on non-AC segments and J on AC segments if C is open.