In your alternative N8 route you've missed out a lot of pot hole warnings.
On the descent towards R turn @60.9 there are some shockers on and just after a fast left bend. Also a couple of miles before Moffat there are a couple of craters which give an 18" wide smooth passage through it. I wouldn't want to miss that smooth bit in the dark.
I've not ridden it myself, so the warnings mirror what's in the original official routesheet that was deprecated many months ago. There are general warnings on the page you download it from, including Danial's own warning, and specific warnings where they were included in the official routesheet. Short of standing by the side of the road with a whistle and waving a yellow triangle, there's not much more I can do.
I already know that the extra climbing won't be on my agenda, and I'll probably be in the dark by then anyway, so will just push through to Moffat on the official route. I'm sure most riders will be feeling the same by then.