I think the menu could greatly benefit from adding some sort of noise. It feels so strange just being in the menu with no noise. I think the game could benefit from having ambient train noises just like Train Simulator 2021. It gives the menu a nice feel to it. They could also bring back the menu music used in TSW2020. I thought it was a good melody to listen to when in the menu. If they were to go with music, they could add several songs that you can pick in the menu just like in Microsoft Flight Simulator X. I think adding one of these would make the menu feel a lot more complete.
As long as you can turn it off in settings, that'd be great. I listen to my own music while playing sometimes and wouldn't want menu music to interrupt that .