So.. Since TSW I've noticed that on the cab car when its supposed to be just rear lights that the top light is lit too. This definitely wasnt the case in TSW3. Also, the destination board IS STILL bugged and resets to "Nicht Einsteigen" after a few seconds. I've even wrote TWO support tickets regarding that. Really really doesn't seem like that big of a problem to fix.
Also in the BR110, the headlights are pretty dim and when you move them to the "dim" position (pressing and holding H) they get brighter. Fairly certain this wasnt the case in TSW3 as well.
