Here is what he is referring to regarding changing the dash backlight. Here is the old dash"backlight"
Here is the new "backlight" What a difference a light bulb makes, huh?
Tough to get a dealer to let you do a 3-4 day unlimited mileage test drive, so my advice would be to rent one and see if its right for you. Hitch up your boat and take it for a drive. A potential $500 rental mistake beats a $50K purchase. Not sure where in Wisconsin you are, but most Hertz locations have an Expedition on the lot, as do some other agencies.
Zero issues with my 08, same with my other Fords. If I were in the market for a replacement, I'd personally wait for the 2018.