I started playing three days ago. After tinkering (building a railway network for the Antilles), I started recreating the entire French railway network (TGV, metro, funiculars, tram, tourist train) (and maybe the European one, but we'll see).
However, I'm still a beginner. And I've noticed a few little things that will be (for me) quality-of-life improvements for begginers.

- Sound. Especially when selecting different elevations or if the railway isn't valid after being drawn. (Far too many times, I thought I selected a bridge, when I actually clicked next to it, or the game didn't understand (?). Now, I use keyboard shortcuts...)
- Improve/finish the wiki. It's incomplete. Pages like "how to create a station" aren't done, even though there are lots of small details and actions that should be referenced for beginners. Even if they can be written in-game, they can remain unclear, especially if the player doesn't speak English fluently.
- Include more keys in the help / Or create a help/hints page. I discovered by chance while searching Steam discussions that the insert key is great and allows you to rework what you've built, instead of razing and rebuilding...
- A button to expand stations (prefabs). Given my task, I don't create all the stations in France; I spam the creation of the basic station. However, in some cases, it would be really nice to be able to click on the side of the station and add a side stop / a railway / a platform, and thus expand the station's width. - Ok, this last point is maybe just for me, but I find the timetable system quite opaque, maybe I didn't dig deep enough (I don't really need to anyway), I didn't really understand how to tell the trams on a line for example to only run between 6am and 1am. It's a shame there's no tutorial on the wiki, at least there are Youtube videos.