I just booked a YVR-CDG for Sept/Oct. I checked the seat maps on af.com for every day of the week around the dates I wanted to fly and only found the new BEST seats on one day out of the week both outbound and return, the rest being the old 2-3-2 config. So I grabbed them. I am hoping the new roll out means more dates with the new seats by then and I can change the outbound. So just check the seat maps on AF website for each day around your travel dates. And Seat Guru does have a version of the new 1-2-1 config.