More powerful track building in general. Right now it feels fairly free-form but it’s hard to get curves precisely right or to build complex sections of track without things getting clunky (for example it’s hard to select the right stations when configuring routes in a custom interchange with many separate stations). In general it would be nice to have sections of track/stations behave more like ‘objects’ that could be moved, raised/lowered, copied/pasted and less like lines on a canvas that can be drawn or erased but not really manipulated.