Yeah its in the PA game files but the unit is not complete/functional yet even if you were to unlock it through the power of modding.
Multiple unit transports aren't supported by the engine yet, instead all units will be stacked on top of each other and you must put them in a que one after the other. (The area transport command only picks up one before stopping) Hoping in the future we can see it come to reality. =)
Queues don't work; you have to keep spamming an area load command because as soon as a unit is picked up the queue is annihilated.
Well if it is real it could mean we might see a T2 Orbital Factory comes with some other things as well I would assume.
Not sure if you're right on that, but I do know selecting a group of unit and then telling them to mount up work. Iirc.