Rocketman nailed it, as usual. These new vans are going to be expensive to maintain and replace parts. The Ecoboost engine is proven, but it's still expensive to maintain. "Ecoboost" is the magical name for "turbocharged direct injection", not unlike the TDI (Turbo Diesel Injection) engine. They both work in exactly the same way, with the same expensive turbochargers and charged air cooling system. Mass airflow sensors, EGRs, temp sensors, all of it, working in concert with the ECU, same as the Sprinter.
People will get a Transit and go, "Hey, it's a Ford! I know how to maintain a Ford!" And they'll be wrong.
Despite there being "a list" of approved fluids, they'll use whatever oil they've been married to for years, use what they know for a 100% certainty is the best ATF money can buy, use their K&N air filters, and change the fluid when they know darn good and well when it's supposed to be changed (instead of when it's actually supposed to be changed), and then they'll know for a 100% certainty that their Ford Transit is a piece of crap, just like the Sprinters are.
Incidentally, my turbo is going bad in the Sprinter. I noticed it a few weeks ago when it started making what sounded like a slight and not very loud belt squeal right around 2000 RPMs as it shifted through the gears on acceleration. It's a little louder now, sounds more like a tea kettle, and a soapy solution sprayed onto the turbo revealed the leak. At the dealer a new OEM turbo is $2300. Book labor is two hours I think.
Don't think a new turbo on these new vans is going to be dramatically cheaper. They won't be.
I can get a new OEM turbo online for $1600, though. I got a new one from Turbocharger Pros for $695 and will reuse the electronic actuator. A newly rebuilt actuator is $550, or straight up used ones can be had on eBay for $300. My point is, people will have to be resourceful for these new vans, same as the Sprinter vans, otherwise they'll be screaming about how much it costs it maintain and repair these things.