"If Entegra (or any manufacturer) were to box up all loose ship items (e.g., remote controls, extra keys, etc.) with a checked-off packing list ensuring that everything that should be there was there, then there's no reason for a responsible dealer to tear everything out of the box and scatter it haphazardly all over the RV. In that respect, the dealer (or, in our case, the packager or contractor) has ultimate control over those loose ship items, but as the manufacturer, that doesn't relieve us of the responsibility to handle them professionally when we ship the equipment out of our facility."
I concur with your concept of consolidating the essential accessories, but I think the responsibility ultimately lands on the last "guy" that uses them. It's all well and good to have everything organized and boxed up at the manuf, but you must allow the dealer to access/use just about everything in that box to prep, demo, test the MH.
Visualize the # of coaches at a large RV show, put together by the dealers detail/maintenance people, driven and shown by salesmen with their infinite knowledge and memory, and then returned to the dealer worked on some more, and put into lot inventory.
Keys missing, remotes, etc I'm surprised more isn't lost given the # number of people who traipse through them before they get sold.
Ultimately I believe it is the dealers responsibility to ensure the paying customer gets everything that supposedly comes with coach.