This is going to be a major pain. To participate in a FC mission, each player MUST have a Tank of Mission Ceruleum, which can only be purchased using the FC credits. Most FC's restrict who can spend credits. In addition, it will be very difficult to fill out a FC mission through the PF as everyone will need one of these tanks. I would guess that most PF missions would exclude those who don't have their own tanks.

I made a post about this problem after release of the preliminary patch notes.