As vinkandoi mentioned, it takes far too many game years to even see the results of a line after a full round trip, then before you know it, its time to replace the vehicles on that new line. Not to mention the period you get to make use of some of the trains is far too short because of this. I know I can edit that aspect of it though via mod’s but still.
The animations (for me) at the second speed feel’s good, but the speed of the days passing by is waaaaaaay over the top, even on the normal speed setting.
Of course, then the income per passenger / cargo unit would also need an adjustment, but surely it could scale accordingly.