Naw, I’m mostly nitpicking here. Perhaps it’s a combination of matching the line art closer to the value of the hatched area, and breaking it up a bit.
Maybe there’s some way you can use the passes you have to drive the stroke direction, or generate fresh data and use the same technique again to break up the line, although maybe you might need to thicken up the line you have for that to work? Maybe project the hatch pattern onto the geometry, and break it up that way?
For that matter, you could also try painting or generating some kind of 2d vector or noise and seeing what you can come up with… or hand painting the line yourself.
I suspect it’ll be a fine balance between having the lines too chaotic to recognise the contour lines for what they are, and them being too mechanical. Best of luck!