Have you gone to the Ford website to check out the packages and options? You can do a "Build & Price" on the vehicle and see what is available in which packages.
I know the paddle shifters are available on the Sport and Platinum but I'm not sure about the other trim levels. When you mention "stock roof bars" are you referring to the cross bars? I'm quite sure that they will not fit as the 2016/17 models all have a different roof rail system.
http://www.explorerforum.com/forums...explorer-roof-racks-totally-different.433974/
As for getting power to the dashcam there are a few threads on that already with different solutions. Here is just one of them.
http://www.explorerforum.com/forums...ng-for-12v-constant-power-for-dashcam.451012/
I suggest that you familiarize yourself with the use of the very handy 'Search' feature (top right) that the forum has. You will find more threads on the topics above.
Depending on what you are looking for, there are features available on the Limited and the Platinum that are not available on the Sport. You can use the "Compare" feature on the Ford website to check that out.
Peter