Ford does not sell enough of them to care that much about them and a lot of what they do sell goes to fleets and police depts. and they don't care about mileage. They should offer the ecoboost as the base engine and for the people who want the power, make the 6.2 an option. It would satisfy both the fuel economy crowd and the power crowd. Ford is to worried about the F150(especially the Raptor the way they have been selling) to concern themselves with the expedition.
Ford sells as many (or more) Expys than Flex so there is a market for them. FOrd hasn't really touched the Gen III since its introduction in 2007.
I hope they clean up the interior and get that more modern. I can't say I really like all of the hard plastic although it is easy to clean. I've never been a fan of the gauges so adding a TFT screen in there and modernizing that would be fantastic!
I for one, would be tickled with the eco-boost, 5.0 or a small turbo diesel. I don't need all the grunt and space all of the time so those would be great options for me, plus they are 50+ more hp than the 5.4L. That might be enough to get me out of my 2007 and into a new one!