In my opinion, a NVFR rating should not exist. It is rarely used for what it was designed for.
I used it commercially many years ago and looking back.....there but for the grace of God go I.
I had an expired MECIR when I exercised it, (a couple of years earlier had done the full training) and I imagine that that is the only reason I'm still alive. If I had had a bare bones NVFR and had done it I can think of a couple of occasions where I would have sucumbed to the visual and somotogravic illusions that exist. Instead I managed to claw it back and only scared myself half to death.
I think it needs reconsidering.