From what I remember, the higher-ups really wanted to keep the game sizes small. The box sets should be competitive right out of the box, and in line with standard game size (or a little smaller).
As for crew composition, each crew needs a master. For Lilith's brood, it's Lilith. She can hire anyone from the Neverborn faction, as well as from the outcasts (outcasts are at a premium). In bigger games, you can have more than one master, but they must be from the same faction, or an outcast master. (Correct me if I'm wrong, folks.)
Different models do have different point costs. We can't be having the Steamborg be as good as an Ice Gamin. Throughout the development of the game, the Wyrd folks have been darn good at keeping things small. If you'd get a box and a booster, chances are that'd be big enough for a standard game. Rules and exact point costs will be coming out soon, though. I wouldn't want to lead you astray.