A rating system would be great especially for us from the east planing a trip out that way who have never ridden high mountain passes. I'm not fond of precipitous heights either.
I think a simple scale of 1-4 would be great with photos of course. "This pass is a 2 with a section at 3 going up" something like that maybe.
With the photos if you take them with someone on the tough parts it would give scale to the photo.
Thanks for the great report.