Suggestions
I think when the annoncements are playing a button on the radio lights up(I don't know which one)
If you can include the distance to the next station and all the stuff on the TOD(The operating display screen)
Make sure the handle is not veritical when the train is not in emergency brakes(It goes horizontal because in real life the T/O has to turn the controller as a safety feauture)
A working reverser
Maybe an animation of the Left/Right Door enables being pushed inwards so the conductor can open the doors. And make sure that the right buttons light up at the right time(you can ask me)
The button under the speedometer on the right of the red one should light up when the brakes are released.
Everything you saidi know and will do , except two things . Im not some random person creating the cab . I always make sure everything thats in the real life counter part is simulated . Just take my R143 and R160 Videos for an example.
Also the light doesnt Flash when an automated announcement is playing and only Flashes Green when the CR makes an announcement . Unless there is a plug-in available out there , then i cant put that feature in. The same thing goes for the distance to the station . Ill Be happy to put that in , but unfortunately i cant find a plug-in nor know how to create one like that .