Passengers seem to be spawned at random locations at a platform. Players can then usually decide if they wanna pick up some passengers from the first, middle, or last part of the platform during a stop. It would be great if they were standing in a logical manner near the entrance, stairwell, stopping point, etc.
Oftentimes the passengers bug out while entering/exiting the trains.
Passenger numbers should be adapted to the type of station, daytime, etc. Oftentimes I have a crowded platform when stopping in the middle of nowhere with an EN57, yet only a few people when stopping in Warzawa with two sets of Pendolino.
