Personal info on the edge:
Many buyers have wondered in advance that was not the entire contents directly on demand and have rated this poor. I do not understand.
Fundamentally it is because this is a Season Pass. This ensures a one-off price, only that the download and the update to realease a new DLCs (add-on) is available.
Season passes never include software only license rights to future add-ons and are supposed to bind the buyer and for meet him priced.
A Season Pass makes only sense if you decide to move anyway to buy all future add-ons, or as many DLCs that they would individually be higher than the price of the Season Pass.