I don’t think that the Imperial March needs to be added to that scene.
Part of what I like about the OT is that not every second of screen time has to have music or something zipping around.
It’s nice to allow things to be quiet every now and then and let the movie breathe and develop.
I agree for the most part, but I think adding that version of the March to Vader’s entrance does more good than harm. I like it better than the full March used during the Battle of Yavin in ANH:R as it is now.