Playable Cargo Planes

Since Playable Cargo Planes are Comming soon what will the gameplay be

Send to destinations, unless they have secretly moved up the timetable for cargo connections (still on the under consideration section of the website), it will be like sending them other places.
The only curious things will be
A) how many slots are you going to be allowed for your destinations
B) are they going to limit destinations to the cargo ones we have now or is it going to be open season like passenger.