You joined yesterday, and your first post is a truck for sale? There is a "for sale" section - moderators, please consider moving to that area. @akirby etc, etc....
Yeah, there are Dealers that do that but as you stated it works against them because everything gets held at the plant until the OTB and shipping release.
If the top section has a lower leftover then the glass does currently, it'll be easier to access the power panel, esp in relation to whatever you would be powering
I can only comment on my mom's BMW - yes, both sections are powered. There is one fob button that opens the top section only. The lower section gets opened via button push on the top of the lower section (when the upper part is open). Closing can be done via one touch of the button on the upper portion.
BMW has a kick activated sensor too, but it is eliminated with the tow package (which my mom's has) so I can't comment on how that operates.
I wonder if both sections will be power operated. I imagine they will be on the Navi but wonder if the Expedition will be too in all forms. I wonder if the fobs on both will have separate buttons for the top section and the lower section.