You could also add some activity to player controlled outposts and fortresses by putting NPC Guardians guarding them

There is no vehicle crew class. Normal characters just gain control over movement/turrets/sponsons/pintles as they hop in. It's up to individual players whether the crew vanishing when the vehicle is empty is more or less personally immersion-breaking than their Aspect Warriors crewing a vehicle.

Necessities of the format.

F2Ork is a clever way of simulating a horde army, with little battle ground tactics or knowledge, and giving them little resources (e.g New players).

Who ever thought was that was very smart. I like the model, but only Ork should be free.

Totally free - yes, Orksez only. Time-limited free or number-limited free - some classes in all races: Scouts for SM, Cultists or / and Renegade Militia (ex-Guardsmen) for Chaos, Guardians (both Defender and Storm ones) for Eldar.

Free is always good way to get people to try out a new game, and boost our KD ratio

annnnnnd its not even happening anymore! It was dropped.

They are still doing it, just not on release. Its for post launch, which will line up with a write in for a massive Ork Migration to the area. The first bunch of Orks is a landing party ?

Have faith my friend.