I custom build my truck 2 years ago and bought Lariat as King Ranch trim was not available with supercab.
Answers to your questions depends a lot on your truck use.
I never used my fog lights to date, but used a lot of navi with live traffic as well as 360 cameras.
Cellphone traffic works, but not as convenient, not saying that using navi on phone drains battery very fast and makes the phone pretty hot.
I've got power rear window, but it is tiny hole. Ford did not show pictures for this option, but if manual window comes in bigger size - that would be my choice.
Leaving power window open when parking (for dogs) will trigger truck alarm, so the usage is limited.
In 120F weather I LOVED remote start. It works from 1/4 mile and by the time we walk across parking to the truck, the interior was bearable to enter.
Locking differential would be my choice, but not available for duallies, so I settled for LSD. Not the best option as I got stuck with it couple of times.
I've got adjustable pedals, but my wife did not drive the truck yet.
Its been only 2 years, so her time is coming
๐Camper package on dually would only beefed front sway bar, when camper actually takes weight off front. What are the engineers thinking? :S
But when you are buying SRW, that might add sway bar to the rear, what is good.