Originally Posted by
Mokshu
A was the old booking class for First Classic awards on AF flights.
Yes, I remember.
Originally Posted by
Mokshu
Only available seats in First are First Flex awards, booked in F. Inventory is shared with P booking class for revenue tickets.
However, all the P seats can't be booked in F class 
Thank you, that's the information I was looking for, though it still is not 100% clear! "Flex" in P would seem to be different than "Flex" in J.
Originally Posted by
Mokshu
Expert Flyer booking class for Air France are totally outdated, and as well for other participating airlines.
Indeed.