You compiled a nice list of possible improvements. I for one don’t care for your points 0 and 1. Also I like the music and ambiente. I’m with you for most of your points 2 and 3 though.
2a especially. I enjoy the game but the lack of a planing feature or an undo option stands in my way to progress the game. I can see myself sink hours into this game, but I get tired with reloading just to get my tracklayout right the 4th time around.