Well, that's what I was hoping you would answer.
If it re-engages smoothly, then I personally would have no hesitation using N while underway where it's beneficial.
You might get some input from one of our other members who has a Fiesta with the automated manual. He neutral coasted in his all the time because his was a rebuilt car with no warranty, but said he'd be wary about it if he had a warranty.
See:
http://ecomodder.com/forum/showthrea...tml#post362243