I have a suggestion for the RABe 523 featured on the Luzern route. My suggestion is to have a controller button mapped to change the speed set control. It could be as simple as using the X button (on Xbox normally to switch brake modes) to switch to letting the left bumper and left trigger to increase and decrease the speed set. This would make the experience better for console and pc players (playing with controller and not wanting to use keyboard). The speed set system is an essential part of operating the 523. With many speed changes it can be disorienting to look at the control and interact with it in the cab.
It's already mapped to the controller? Hold down the function modifier button (X on Xbox, □ on PlayStation) and then hold down the RT/R2 or the RB/R1 buttons to increase/decrease the maximum speed.