The onslaught of products we seem to be getting may also be a result of FFG needing to kick things into high gear. They basically lost a year off their licensing with this game coming out now. Yes extensions are possible…but those only come if there are sales to warrant one.
I'm thinking this is most likely, they do have a lot of lost time to make up on, even though X-Wing seems to be making plenty of money for them for the moment. For what we all assume the licence must have cost, having "a year off" must have been terrible for them.
I wonder how much of a required purchase Balance of the Force will be, though. If it is solely to introduce multiplayer rules, then I may actually find myself not bothering with it. If the cards are just as much use for one-on-one games, though, we shall see…