TL;DR
The new revamped train stop dialog box is comically small, showing only 3 trains at a time.


What ?
The newly redesigned train stop dialog was shrunk to only show 3 trains at a time compared to the "old" dialog design which expanded the UI as more trains were added to the stop. At 1440 ...

New trains look awesome!
One possible issue is, the alignment between the wagons is different from vanilla trains. There's no 1 tile gap between wagons. I don't know if this is intentional (it does look pretty good), but this means we can't use these and regular trains on the same stations ...