Truth is we have no idea what characteristics led to the NSE except for what Dean has told us. Unless we see the letter, we might never know.
I've worked on numerous government projects where something is rejected because Paragraph 3 should be Paragrpah 57 and although you recieved guidance from the government agency approving Paragrpah 3 as Paragrpah 3, some other bureacrat comes along, says its wrong, and rejects it. It would be comical if it weren't such a waste of taxpayer time and money.
Not saying there is nothing fundamentally wrong with the DVIS, but to attribute NSE to the machine is assuming facts not in evidence at this point in time.