I know in the past at other forums I've made various suggestions that could improve the editor such as better terrain painting tools and copy/paste function, probably got to accept that isn't going to happen any time soon. However there are a couple of ideas that would make life a bit easier for the would be route builder. 1. When using easements, the tracer lines are very faint and hard to see, they really need a higher contrast against the terrain. 2. Some sort of wire frame mode so you can see (1) above when it goes under the terrain, where there will be a cutting or tunnel without having to dive under and try to eyeball where the placement will go. Perhaps the above could be considered for future updates to classic TS.
There have been a few over the years but the core functionality is essentially the same as when it originally started out as Kuju Rail Simulator. As we have seen it is possible to produce excellent results with the tools provided, but there is room for improvement.