I've created around 40 scenes now for my campain, and it's working great. I decided to divide music and ambience so that I can easily choose different music themes for the same background. For example: The players are in a cave, and one moment I might want stressfull music, and another moment more calm music but I want to keep the ambient effect of the cave in both scenes. I made several music themes and several ambience scenes, and since I can play several at the same time I get a more dynamic soundenviroment. I don't have to create a new scene for EVERY possible situation. I can combine my ambience effects and my music scenes.
My suggestion is this: You split the big black area in two, or make it an option. Perhaps a "line" you can drag to split the screen (not unlike how you can split an excel-file). This way you can choose to sort one kind of scenes to the left and for example ambience on the left. You can keep some sort of order.
