As far as Ford reusing Mustang styling for this vehicle, then I'm all for it. The mustang is an alright looking car, but I would hope people buy mustangs because they also believe in Ford. Sorry to say, but in order for a company to be successful, you're going to have to reuse some parts. Waaaaay too much money would be spent in R&D in order to develop all new stylings for all new cars. Just a dumb business move. I want to see Ford succeed, so if they reuse some parts, go for it. Just try not to use any parts of my focus. I want to see a good car, like I said. lol
Ford is not using Mustang Sheetmetal, it is taking from the past and using that DNA to develop something new.
I doubt many parts from a Mustang are actually in a Mach E. Perhaps the suspension components, or other such things. Door handles, seat belts, switches, etc.