The most important new feature for the next update will be the route editor. I've posted a couple of videos:
https://lapioware.itch.io/diesel-railcar-simulator/devlog/51795/route-editor-pre...
https://lapioware.itch.io/diesel-railcar-simulator/devlog/57666/route-editor-pre...
In addition there will be optimisations, bugfixes (like fixing the key configuration with AZERTY keyboard) and graphics improvements. The update will hopefully be ready for testing this month and the official release in January. I'm sorry it's taken this long to make the update but it turned out to be much more difficult to do than I expected.