Since you've said previously that you've kept the amount of passengers wanting to board the train to a minimum because the AI behavior of the passenger isn't where you want it to be at yet I propose the following: Some of us want to transport more passengers and care less or not at all about a few floating passengers. Give us the option to change the passenger density. (Although preferred, it doesn't have to be in percentage but low, medium and high or experimental will suffice.)
That's why I suggested to make it an option to be enabled. Alternatively just add it for the poeple who play on PC.