Yep, the whole advantage to the Promaster is the incredibly low floor throughout the cargo area due to the FWD. You get a really high ceiling without a really tall van. Jeffrey, there are several working on and selling 4wd systems for the Transit if you like it. Another disadvantage I've heard about the Promaster is lack of power and a robust drivetrain, pretty typical for Chrysler products IMHO. The Ecoboost in the Transit is quite a machine and can be had in 4x4.
Here's what Chevy needs to build, since their the last ones to bring out a new Euro style van, if they ever do:
1.Economical and powerful turbo diesel
2.Low floor like Promaster but with 4wd or AWD
3.Styling to equal the Sprinter, which is worlds better than the ugly Transit or Promaster nose (my opinion, and I bought a Transit but still don't love the nose)
4.60/40 barn doors on the sides like the older vans without forcing everyone to endure a slider door
5.Perhaps something engineered to be reliable, not have a million recalls and be as tough as the old body-on-frame vans we all love.