Most people on here want the "Look" not so much the off road ability.You should add the SAS pkg back, there is a lot of hardware that comes with it that is costly to add later, mainly the re-geared axles and lockers and all the electronics to control it. Also it is not really a constraint item anymore, that was old news from back in the middle of this year.
You can keep up with the scheduling constraints on this thread on blue oval forum. It will show what options are in short supply or not orderable week by week. Based on that you can add/remove options that will help your chances of being scheduled for production.
Weekly Ford scheduling notes