Agreed.I was thinking about it in terms of (1) Ford offers a goose on their Hybrid, so it's not going to be a new thing to offer it on the EV and (2) the chassis is still a ladder frame, so it's not as if they've gone to a unitary body chassis (which would never handle a gooseneck. So "all" they need is to change the dimensions to suit the new frame and offer some fortification to the rear suspension.
From a marketing perspective, I see huge upside in showing the Lightning with a modest gooseneck trailer (like a horse float.) It's a show of strength and a gauntlet thrown down to GM and RAM or to keep quiet about max towing …
I know a lot of affluent equestrians around here who tow their horses maybe 10 miles each way and would love to have a 9.6kW silent generator keeping the champagne chilled between rides … : )
I've talked to B&W Hitch and they said they haven't seen one so they aren't sure. I agree that it looks like a pretty straight forward install. If Ford will offer it from the factory I'd likely just simply go with that.
My wife camps in her trailer. So the ability to run items off of the truck would be a huge benefit for her. Also, if the campground has electric then it's a bonus as she could charge the truck before departure as well.