More Cabin Size Choices For The F-Series

I think that Ford should allow more cabin size options for the F-Series. If there is a family of six, and they get a pickup, how are they all supposed to fit in there? The only option is to get a F-650 which is hugely expensive, and is hard to get your hands on. the cabin should still have two doors (I don't want to get too complicated) but still have a way-back row of seats.
matt w 12/13/2013
expedition? a crew cab seats six adults easily.