Not knowing the route
I am a classic example of somebody creating who doesn't know the route they are working on, apart from the Dawlish section which I do.
My way of working is much the same, I use GE to see what is there and try to match it. The real problem is elevation, so I use a DEM and that solves that little problem - mainly.
I also use Ordnance Survey maps for height/elevations checks, they come in really handy because at times the DEM goes astray.
Maybe my routes also bear no relation to the area produced, I don't know, I have never been there.
And as has been said, age and Trainz usage do come into the equation. It was two years before I started on the first section at Paddington, before that my routes were rubbish - maybe they still are in some people's eyes...
Beauty is in the eye of the beholder.
Angela